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Then relations between heteroclinic orbits of an uncontrolled and unperturbed system and controllability for small control ranges and small perturbations are studied using Melnikov's method. Finally, a system with two-well potential is studied in detail.<\/jats:p>","DOI":"10.1137\/070704733","type":"journal-article","created":{"date-parts":[[2009,3,6]],"date-time":"2009-03-06T18:13:14Z","timestamp":1236363194000},"page":"1055-1079","source":"Crossref","is-referenced-by-count":4,"title":["Control Systems with Almost Periodic Excitations"],"prefix":"10.1137","volume":"48","author":[{"given":"Fritz","family":"Colonius","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tobias","family":"Wichtrey","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"351","published-online":{"date-parts":[[2009,3,6]]},"reference":[{"key":"R1","doi-asserted-by":"crossref","unstructured":"H. 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Simiu,\n                      Chaotic Transitions in Deterministic and Stochastic Dynamical Systems\n                      , Princeton University Press, Princeton, NJ, 2002.","DOI":"10.1515\/9781400832507"},{"key":"R23","doi-asserted-by":"publisher","DOI":"10.1142\/S0218127491000087"},{"key":"R24","doi-asserted-by":"publisher","DOI":"10.3934\/dcdsb.2003.3.361"},{"key":"R25","unstructured":"J. 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