@article{ARM_1977__13_2_a1,
     author = {Bartu\v{s}ek, Miroslav},
     title = {On distribution of zeros of solutions of the differential equation $(p(t)y')'+f(t,y,y')=0$},
     journal = {Archivum mathematicum},
     pages = {69--74},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1977},
     mrnumber = {0492523},
     zbl = {0383.34023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1977__13_2_a1/}
}