@article{IVM_1965_4_a8,
     author = {N. K. Kulikov},
     title = {Qualitative-quantitative investigation of the solutions of second-order ordinary linear homogeneous differential equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {75--83},
     publisher = {mathdoc},
     number = {4},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1965_4_a8/}
}