@article{IVM_1967_5_a4,
     author = {I. I. Endovickii},
     title = {Stability conditions for the solutions of a~linear differential equation of the second order with a~periodic coefficient},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {28--33},
     publisher = {mathdoc},
     number = {5},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1967_5_a4/}
}