@article{10_4064_ap_72_3_273_284,
     author = {Ond\v{r}ej Do\v{s}l\'y and Alexander Lomtatidze},
     title = {Disconjugacy and disfocality criteria for second order singular half-linear differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {273--284},
     publisher = {mathdoc},
     volume = {72},
     number = {3},
     year = {1999},
     doi = {10.4064/ap-72-3-273-284},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-72-3-273-284/}
}