Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1980__16_3_a0, author = {Bartu\v{s}ek, Miroslav}, title = {Monotonicity theorems for second order non-linear differential equations}, journal = {Archivum mathematicum}, pages = {127--135}, publisher = {mathdoc}, volume = {16}, number = {3}, year = {1980}, mrnumber = {594458}, zbl = {0448.34041}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1980__16_3_a0/} }
Bartušek, Miroslav. Monotonicity theorems for second order non-linear differential equations. Archivum mathematicum, Tome 16 (1980) no. 3, pp. 127-135. http://geodesic.mathdoc.fr/item/ARM_1980__16_3_a0/