@article{DE_1968_4_5_a1,
     author = {A. I. Subbotin},
     title = {Regularization of a certain problem on the contact of motions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {779--784},
     publisher = {mathdoc},
     volume = {4},
     number = {5},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_5_a1/}
}