Opial, Z.. "Sur les périodes des solutions de l'équation différentielle x'' + g(x) = 0." Annales Polonici Mathematici 10.1 (1961): 49-72. <http://eudml.org/doc/208128>.
@article{Opial1961, author = {Opial, Z.}, journal = {Annales Polonici Mathematici}, keywords = {ordinary differential equations}, language = {fre}, number = {1}, pages = {49-72}, title = {Sur les périodes des solutions de l'équation différentielle x'' + g(x) = 0}, url = {http://eudml.org/doc/208128}, volume = {10}, year = {1961}, }
TY - JOUR AU - Opial, Z. TI - Sur les périodes des solutions de l'équation différentielle x'' + g(x) = 0 JO - Annales Polonici Mathematici PY - 1961 VL - 10 IS - 1 SP - 49 EP - 72 LA - fre KW - ordinary differential equations UR - http://eudml.org/doc/208128 ER -