The existence of periodic solutions of an autonomous second order non-linear differential equation
G. J. Butler
Annales Polonici Mathematici, Tome 29 (1974), p. 165-174 / Harvested from The Polish Digital Mathematics Library
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Publié le : 1974-01-01
EUDML-ID : urn:eudml:doc:263677 
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     title = {The existence of periodic solutions of an autonomous second order non-linear differential equation},
     journal = {Annales Polonici Mathematici},
     volume = {29},
     year = {1974},
     pages = {165-174},
     zbl = {0288.34035},
     language = {en},
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G. J. Butler. The existence of periodic solutions of an autonomous second order non-linear differential equation. Annales Polonici Mathematici, Tome 29 (1974) pp. 165-174. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-22cda4a6-7300-44a4-8205-ed63bd53a688/