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In such a situation, the segments of a chaotic trajectory in which its phase follows the phase of the force, can alternate with short segments of phase-locking in ratios different from 1:1. This phenomenon is demonstrated for several nonlinear systems.<\/jats:p>","DOI":"10.1142\/s0218127400001626","type":"journal-article","created":{"date-parts":[[2003,5,7]],"date-time":"2003-05-07T04:18:55Z","timestamp":1052281135000},"page":"2649-2667","source":"Crossref","is-referenced-by-count":10,"title":["ON PHASE SYNCHRONIZATION BY PERIODIC FORCE IN CHAOTIC OSCILLATORS WITH SADDLE EQUILIBRIA"],"prefix":"10.1142","volume":"10","author":[{"given":"MICHAEL A.","family":"ZAKS","sequence":"first","affiliation":[{"name":"Institute of Physics, Potsdam University,  PF 601553, D-14415 Potsdam, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"EUN-HYOUNG","family":"PARK","sequence":"additional","affiliation":[{"name":"Institute of Physics, Potsdam University,  PF 601553, D-14415 Potsdam, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J\u00dcRGEN","family":"KURTHS","sequence":"additional","affiliation":[{"name":"Institute of Physics, Potsdam University,  PF 601553, D-14415 Potsdam, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2011,11,20]]},"reference":[{"key":"p_1","first-page":"201","volume":"149","author":"Afraimovich V. 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