@article{IVM_1962_2_a20,
     author = {E. S. Chichkin},
     title = {A theorem on a differential inequality for multi-point boundary-value problems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {170--179},
     publisher = {mathdoc},
     number = {2},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1962_2_a20/}
}