{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,10]],"date-time":"2026-03-10T04:18:16Z","timestamp":1773116296998,"version":"3.50.1"},"reference-count":9,"publisher":"Springer Science and Business Media LLC","issue":"2","license":[{"start":{"date-parts":[[2021,6,10]],"date-time":"2021-06-10T00:00:00Z","timestamp":1623283200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2021,6,10]],"date-time":"2021-06-10T00:00:00Z","timestamp":1623283200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Period Math Hung"],"published-print":{"date-parts":[[2021,12]]},"DOI":"10.1007\/s10998-021-00384-z","type":"journal-article","created":{"date-parts":[[2021,6,10]],"date-time":"2021-06-10T07:07:21Z","timestamp":1623308841000},"page":"260-271","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Extensions of left regular bands by $${\\mathcal {R}}$$-unipotent semigroups"],"prefix":"10.1007","volume":"83","author":[{"given":"Bernd","family":"Billhardt","sequence":"first","affiliation":[]},{"given":"Paula","family":"Marques-Smith","sequence":"additional","affiliation":[]},{"given":"Paula Mendes","family":"Martins","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2021,6,10]]},"reference":[{"issue":"3","key":"384_CR1","doi-asserted-by":"publisher","first-page":"317","DOI":"10.1142\/S0218196795000197","volume":"5","author":"B Billhardt","year":"1995","unstructured":"B. Billhardt, Extensions of regular orthogroups by inverse semigroups. Int. J. Algebra Comput. 5(3), 317\u2013342 (1995)","journal-title":"Int. J. Algebra Comput."},{"key":"384_CR2","doi-asserted-by":"publisher","first-page":"45","DOI":"10.1007\/BF03025748","volume":"45","author":"B Billhardt","year":"1992","unstructured":"B. Billhardt, On a wreath product embedding and idempotent pure congruences on inverse semigroups. Semigroup Forum 45, 45\u201354 (1992)","journal-title":"Semigroup Forum"},{"key":"384_CR3","first-page":"161","volume":"67","author":"B Billhardt","year":"2001","unstructured":"B. Billhardt, On $$\\lambda $$-semidirect products by locally $${\\cal{R}}$$-unipotent semigroups. Acta Sci. Math. 67, 161\u2013176 (2001)","journal-title":"Acta Sci. Math."},{"key":"384_CR4","doi-asserted-by":"publisher","first-page":"51","DOI":"10.1007\/s00233-010-9239-9","volume":"81","author":"MJJ Branco","year":"2010","unstructured":"M.J.J. Branco, G.M.S. Gomes, V. Gould, Extensions and covers for semigroups whose idempotents form a left regular band. Semigroup Forum 81, 51\u201370 (2010)","journal-title":"Semigroup Forum"},{"key":"384_CR5","doi-asserted-by":"crossref","DOI":"10.1093\/oso\/9780198511946.001.0001","volume-title":"Fundamentals of Semigroup Theory","author":"JM Howie","year":"1995","unstructured":"J.M. Howie, Fundamentals of Semigroup Theory (Claredon Press, Oxford, 1995)"},{"key":"384_CR6","doi-asserted-by":"publisher","DOI":"10.1142\/3645","volume-title":"Inverse Semigroups","author":"MV Lawson","year":"1998","unstructured":"M.V. Lawson, Inverse Semigroups (World Sci. Publishing Co. Inc, River Edge, NJ, The Theory of Partial Symmetries, 1998)"},{"key":"384_CR7","volume-title":"Inverse Semigroups","author":"M Petrich","year":"1984","unstructured":"M. Petrich, Inverse Semigroups (Wiley, New York, 1984)"},{"key":"384_CR8","doi-asserted-by":"publisher","first-page":"87","DOI":"10.1007\/BF02575526","volume":"32","author":"MB Szendrei","year":"1985","unstructured":"M.B. Szendrei, $$E$$-unitary $${\\cal{R}}$$-unipotent semigroups. Semigroup Forum 32, 87\u201396 (1985)","journal-title":"Semigroup Forum"},{"key":"384_CR9","doi-asserted-by":"publisher","first-page":"209","DOI":"10.1016\/0021-8693(74)90064-7","volume":"31","author":"PS Venkatesan","year":"1974","unstructured":"P.S. Venkatesan, Right (left) inverse semigroups. J. Algebra 31, 209\u2013217 (1974)","journal-title":"J. Algebra"}],"container-title":["Periodica Mathematica Hungarica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s10998-021-00384-z.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s10998-021-00384-z\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s10998-021-00384-z.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,11,4]],"date-time":"2023-11-04T18:50:05Z","timestamp":1699123805000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s10998-021-00384-z"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,6,10]]},"references-count":9,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2021,12]]}},"alternative-id":["384"],"URL":"https:\/\/doi.org\/10.1007\/s10998-021-00384-z","relation":{},"ISSN":["0031-5303","1588-2829"],"issn-type":[{"value":"0031-5303","type":"print"},{"value":"1588-2829","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,6,10]]},"assertion":[{"value":"10 August 2020","order":1,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"10 June 2021","order":2,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}}]}}