Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1989__39_4_a6, author = {Rach\r{u}nkov\'a, Irena}, title = {The first kind periodic solutions of differential equations of the second order}, journal = {Mathematica slovaca}, pages = {407--415}, publisher = {mathdoc}, volume = {39}, number = {4}, year = {1989}, mrnumber = {1094763}, zbl = {0753.34028}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1989__39_4_a6/} }
Rachůnková, Irena. The first kind periodic solutions of differential equations of the second order. Mathematica slovaca, Tome 39 (1989) no. 4, pp. 407-415. http://geodesic.mathdoc.fr/item/MASLO_1989__39_4_a6/