@article{10_5817_AM2013_1_9,
     author = {Chv\'atal, Martin and Do\v{s}l\'y, Ond\v{r}ej},
     title = {Variational method and conjugacy criteria for half-linear differential equations},
     journal = {Archivum mathematicum},
     pages = {9--16},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {2013},
     doi = {10.5817/AM2013-1-9},
     mrnumber = {3073011},
     zbl = {06321143},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5817/AM2013-1-9/}
}