@article{IVM_1977_6_a4,
     author = {I. I. Endovickii},
     title = {Oscillations of the solutions of second order linear equations with bounded coefficients},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {44--49},
     publisher = {mathdoc},
     number = {6},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1977_6_a4/}
}