@article{RM_1970_25_2_a20,
     author = {I. P. Makarov},
     title = {Inter-College {Conference} on {Qualitative} {Theory} of {Differential} {Equations,} {Ryazan'}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1970},
     volume = {25},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1970_25_2_a20/}
}