@article{IIMI_2020_56_a0,
     author = {S. N. Popova},
     title = {In memory of {Evgeny} {Leonidovich} {Tonkov} (1940--2014)},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {3--4},
     publisher = {mathdoc},
     volume = {56},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2020_56_a0/}
}