@article{10_4064_ap77_1_3,
     author = {N. Parhi and S. Panigrahi},
     title = {On distance between zeros of solutions of
third order differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {21--38},
     publisher = {mathdoc},
     volume = {77},
     number = {1},
     year = {2001},
     doi = {10.4064/ap77-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap77-1-3/}
}