{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T03:25:59Z","timestamp":1768015559884,"version":"3.49.0"},"reference-count":25,"publisher":"World Scientific Pub Co Pte Lt","issue":"05","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Bifurcation Chaos"],"published-print":{"date-parts":[[2007,5]]},"abstract":"<jats:p> We investigate in this Letter different dynamical states in the ring of four mutually coupled self-sustained electrical systems with time periodic coupling. The transition boundaries that can occur between instability and complete synchronization states when the coupling strength varies are derived using the Floquet theory and the Whittaker method. The effects of the amplitude of the periodic parametric perturbations of the coupling parameter on the stability boundaries are analyzed. Numerical simulations are then performed to complement the analytical results. <\/jats:p>","DOI":"10.1142\/s0218127407018075","type":"journal-article","created":{"date-parts":[[2007,8,6]],"date-time":"2007-08-06T10:12:53Z","timestamp":1186395173000},"page":"1775-1783","source":"Crossref","is-referenced-by-count":3,"title":["DYNAMICAL STATES IN A RING OF FOUR MUTUALLY COUPLED SELF-SUSTAINED ELECTRICAL SYSTEMS WITH TIME PERIODIC COUPLING"],"prefix":"10.1142","volume":"17","author":[{"given":"R.","family":"YAMAPI","sequence":"first","affiliation":[{"name":"Department of Physics, Faculty of Science, University of Douala, P.O. Box 24157 Douala, Cameroon"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"BOWONG","sequence":"additional","affiliation":[{"name":"Department of Applied Mathematics, Faculty of Science, University of Douala, P.O. 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