{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,7]],"date-time":"2025-10-07T08:46:37Z","timestamp":1759826797677},"reference-count":16,"publisher":"Springer Science and Business Media LLC","issue":"2","license":[{"start":{"date-parts":[[1984,2,1]],"date-time":"1984-02-01T00:00:00Z","timestamp":444441600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Found Phys"],"published-print":{"date-parts":[[1984,2]]},"DOI":"10.1007\/bf00729971","type":"journal-article","created":{"date-parts":[[2004,12,2]],"date-time":"2004-12-02T08:45:55Z","timestamp":1101977155000},"page":"147-154","source":"Crossref","is-referenced-by-count":13,"title":["Self-adjointness of momentum operators in generalized coordinates"],"prefix":"10.1007","volume":"14","author":[{"given":"J. M.","family":"Domingos","sequence":"first","affiliation":[]},{"given":"M. H.","family":"Caldeira","sequence":"additional","affiliation":[]}],"member":"297","reference":[{"key":"CR1","first-page":"204","volume-title":"Quantum Mechanics for Hamiltonians Defined as Quadratic Forms","author":"B. Simon","year":"1971","unstructured":"B. Simon,Quantum Mechanics for Hamiltonians Defined as Quadratic Forms (Princeton University Press, Princeton, New Jersey, 1971), p. 204."},{"key":"CR2","doi-asserted-by":"crossref","DOI":"10.1007\/978-3-642-46378-5","volume-title":"Principles of Advanced Mathematical Physics","author":"R. D. Richtmeyer","year":"1978","unstructured":"R. D. Richtmeyer,Principles of Advanced Mathematical Physics (Springer, New York, 1978), Vol. I, Chapter 7."},{"key":"CR3","first-page":"255","volume-title":"Methods of Modern Mathematical Physics","author":"M. Reed","year":"1972","unstructured":"M. Reed and B. Simon,Methods of Modern Mathematical Physics (Academic Press, New York, 1972), Vol. I, p. 255."},{"key":"CR4","first-page":"128","volume-title":"Theory of Linear Operators in Hilbert Space","author":"N. I. Akhiezer","year":"1980","unstructured":"N. I. Akhiezer and I. M. Glazman,Theory of Linear Operators in Hilbert Space (Pitman, London, 1980), Vol. I, pp. 128 and 156."},{"key":"CR5","first-page":"305","volume-title":"Le\u00e7ons d'Analyse Fonctionelle","author":"F. Riesz","year":"1972","unstructured":"F. Riesz and B. Sz-Nagy,Le\u00e7ons d'Analyse Fonctionelle (Gauthier-Villars, Paris, 1972), 6th edn., p. 305;Functional Analysis (Ungar, New York, 1955).","edition":"6th edn."},{"key":"CR6","first-page":"135","volume-title":"Methods of Modern Mathematical Physics","author":"M. Reed","year":"1975","unstructured":"M. Reed and B. Simon,Methods of Modern Mathematical Physics (Academic Press, New York, 1975), Vol. II, pp. 135."},{"key":"CR7","doi-asserted-by":"crossref","first-page":"653","DOI":"10.1103\/PhysRev.85.653","volume":"85","author":"B. DeWitt","year":"1952","unstructured":"B. DeWitt,Phys. Rev. 85, 653 (1952).","journal-title":"Phys. Rev."},{"key":"CR8","first-page":"145","volume-title":"Boundary Value Problems of Mathematical Physics","author":"I. Stakgold","year":"1967","unstructured":"I. Stakgold,Boundary Value Problems of Mathematical Physics (Macmillan, New York, 1967), p. 145."},{"key":"CR9","first-page":"84","volume-title":"Differential Operators of Mathematical Physics","author":"G. Hellwig","year":"1967","unstructured":"G. Hellwig,Differential Operators of Mathematical Physics (Addison-Wesley, Reading, Massachusetts, 1967), pp. 84 and 174."},{"key":"CR10","first-page":"20","volume-title":"Mathematics of Contemporary Physics","author":"B. Simon","year":"1972","unstructured":"B. Simon, inMathematics of Contemporary Physics, R. F. Streater, ed. (Academic Press, New York, 1972), p. 20."},{"key":"CR11","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1007\/BF00708609","volume":"1","author":"G. R. Gruber","year":"1971","unstructured":"G. R. Gruber,Found. Phys. 1, 227 (1971).","journal-title":"Found. Phys."},{"key":"CR12","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1007\/978-1-4612-6027-1","volume-title":"Linear Operators in Hilbert Spaces","author":"J. Weidmann","year":"1980","unstructured":"J. Weidmann,Linear Operators in Hilbert Spaces (Springer, New York, 1980), p. 73."},{"key":"CR13","first-page":"61","volume-title":"Theoretical Mechanics","author":"E. J. Saletan","year":"1971","unstructured":"E. J. Saletan and A. H. Cromer,Theoretical Mechanics (Wiley, New York, 1971), p. 61."},{"key":"CR14","first-page":"51","volume-title":"Tensor Analysis","author":"I. S. Sokolnikoff","year":"1964","unstructured":"I. S. Sokolnikoff,Tensor Analysis (Wiley, New York, 1964), p. 51."},{"key":"CR15","first-page":"153","volume-title":"The Principles of Quantum Mechanics","author":"P. A. M. Dirac","year":"1976","unstructured":"P. A. M. Dirac,The Principles of Quantum Mechanics (Oxford University Press, Oxford, 1976), 4th edn., p. 153.","edition":"4th edn."},{"key":"CR16","first-page":"143","volume-title":"Introduction to Quantum Mechanics","author":"R. H. Dicke","year":"1963","unstructured":"R. H. Dicke and J. P. Wittke,Introduction to Quantum Mechanics (Addison-Wesley, Reading, Massachusetts, 1963), p. 143."}],"container-title":["Foundations of Physics"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1007\/BF00729971.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/link.springer.com\/article\/10.1007\/BF00729971\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1007\/BF00729971","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,4,5]],"date-time":"2019-04-05T08:51:35Z","timestamp":1554454295000},"score":1,"resource":{"primary":{"URL":"http:\/\/link.springer.com\/10.1007\/BF00729971"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1984,2]]},"references-count":16,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1984,2]]}},"alternative-id":["BF00729971"],"URL":"https:\/\/doi.org\/10.1007\/bf00729971","relation":{},"ISSN":["0015-9018","1572-9516"],"issn-type":[{"value":"0015-9018","type":"print"},{"value":"1572-9516","type":"electronic"}],"subject":[],"published":{"date-parts":[[1984,2]]}}}