@article{VSGU_2019_25_4_a4,
     author = {M. V. Shamolin},
     title = {Problems of differential and topological diagnostics. {Part~3.} {The} checking problem},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {36--47},
     year = {2019},
     volume = {25},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2019_25_4_a4/}
}