@article{GDZPPN002549743, title = {Periodic Solutions by Exponential Convergence (Short Communication)}, journal = {Aequationes mathematicae}, volume = {7}, year = {1971}, pages = {117-117}, language = {en}, url = {http://dml.mathdoc.fr/item/GDZPPN002549743} }
FINK, A.M. Periodic Solutions by Exponential Convergence (Short Communication). Aequationes mathematicae, Tome 7 (1971) p. 117. http://gdmltest.u-ga.fr/item/GDZPPN002549743/