@article{10_21136_CMJ_1959_100365,
     author = {Gregu\v{s}, Michal},
     title = {Oszillatorische {Eigenschaften} der {L\"osungen} der linearen {Differentialgleichung} dritter {Ordnung} $y'''+2Ay'+(A'+b)y=0$, wo $A=A(x) \leqq 0$ ist},
     journal = {Czechoslovak Mathematical Journal},
     pages = {416--428},
     publisher = {mathdoc},
     volume = {09},
     number = {3},
     year = {1959},
     doi = {10.21136/CMJ.1959.100365},
     mrnumber = {0111888},
     zbl = {0093.08801},
     language = {ge},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1959.100365/}
}