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In this paper we investigate the possibility, at least within the context of analytical approximations, to obtain the phase model corresponding to a given nonlinear system. Both periodically driven and coupled oscillators are considered, and examples based on Stuart\u2013Landau and van der Pol systems are given. <\/jats:p>","DOI":"10.1142\/s0218127410025934","type":"journal-article","created":{"date-parts":[[2010,4,1]],"date-time":"2010-04-01T08:50:35Z","timestamp":1270111835000},"page":"645-656","source":"Crossref","is-referenced-by-count":3,"title":["PHASE MODEL REDUCTION AND PHASE LOCKING OF COUPLED NONLINEAR OSCILLATORS"],"prefix":"10.1142","volume":"20","author":[{"given":"MICHELE","family":"BONNIN","sequence":"first","affiliation":[{"name":"Department of Electronics, Politecnico di Torino, Corso Duca degli Abruzzi 24, I\u201310129, Turin, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"FERNANDO","family":"CORINTO","sequence":"additional","affiliation":[{"name":"Department of Electronics, Politecnico di Torino, Corso Duca degli Abruzzi 24, I\u201310129, Turin, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"MARCO","family":"GILLI","sequence":"additional","affiliation":[{"name":"Department of Electronics, Politecnico di Torino, Corso Duca degli Abruzzi 24, I\u201310129, Turin, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2012,5,2]]},"reference":[{"key":"rf1","doi-asserted-by":"publisher","DOI":"10.1103\/RevModPhys.77.137"},{"key":"rf2","volume-title":"Synchronization in Science and Technology","author":"Blekhman I. 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