@article{DE_1980_16_3_a25,
     author = {N. P. Erugin and A. A. Samarskii},
     title = {Aleksandr {Andreevi{\v{c}}} {\v{S}estakov} (on the occasion of his 60th birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {564--570},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_3_a25/}
}