{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,12]],"date-time":"2026-04-12T02:54:10Z","timestamp":1775962450270,"version":"3.50.1"},"reference-count":12,"publisher":"IOP Publishing","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Phys. Educ."],"published-print":{"date-parts":[[2012,3]]},"DOI":"10.1088\/0031-9120\/47\/2\/169","type":"journal-article","created":{"date-parts":[[2012,2,20]],"date-time":"2012-02-20T17:13:37Z","timestamp":1329758017000},"page":"169-173","source":"Crossref","is-referenced-by-count":11,"title":["Atwood\u2019s machine as a tool to introduce variable mass systems"],"prefix":"10.1088","volume":"47","author":[{"given":"C\u00e9lia A","family":"de Sousa","sequence":"first","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2012,2,20]]},"reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1119\/1.16115"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtbi.2007.06.011"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1016\/j.physa.2009.02.010"},{"key":"4","first-page":"75","volume":"4","author":"Cveticanin L","year":"2010","journal-title":"J. Serbian Soc. Comp. Mech."},{"key":"5","doi-asserted-by":"crossref","first-page":"433","DOI":"10.1088\/0143-0807\/23\/4\/307","volume":"23","author":"de Sousa C A","year":"2002","journal-title":"Eur. J. Phys.","ISSN":"https:\/\/id.crossref.org\/issn\/0143-0807","issn-type":"print"},{"key":"6","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1088\/0143-0807\/25\/1\/007","volume":"25","author":"de Sousa C A","year":"2004","journal-title":"Eur. J. Phys.","ISSN":"https:\/\/id.crossref.org\/issn\/0143-0807","issn-type":"print"},{"key":"7","first-page":"461","volume":"99","author":"Djerassi S","year":"1998","journal-title":"Adv. Astronaut. Sci.","ISSN":"https:\/\/id.crossref.org\/issn\/0065-3438","issn-type":"print"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1119\/1.2341703"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.1023\/B:INAM.0000046226.90924.dd"},{"key":"10","doi-asserted-by":"publisher","DOI":"10.2514\/3.29897"},{"key":"11","doi-asserted-by":"publisher","DOI":"10.1119\/1.1986466"},{"key":"12","first-page":"1297","volume":"119","author":"Tran T","year":"2005","journal-title":"Adv. Astronaut. Sci.","ISSN":"https:\/\/id.crossref.org\/issn\/0065-3438","issn-type":"print"}],"container-title":["Physics Education"],"original-title":[],"deposited":{"date-parts":[[2020,4,11]],"date-time":"2020-04-11T05:49:33Z","timestamp":1586584173000},"score":1,"resource":{"primary":{"URL":"https:\/\/iopscience.iop.org\/article\/10.1088\/0031-9120\/47\/2\/169"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,2,20]]},"references-count":12,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2012,3,1]]}},"alternative-id":["S0031-9120(12)01191-4"],"URL":"https:\/\/doi.org\/10.1088\/0031-9120\/47\/2\/169","relation":{},"ISSN":["0031-9120","1361-6552"],"issn-type":[{"value":"0031-9120","type":"print"},{"value":"1361-6552","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,2,20]]}}}