@article{DE_1997_33_5_a0,
     author = {A. F. Andreev and I. V. Gaishun and V. I. Gromak and N. A. Izobov and V. A. Il'in and I. T. Kiguradze and N. N. Krasovskii and L. D. Kudryavtsev and N. A. Lukashevich and I. P. Martynov and V. A. Pliss and L. A. Cherkas and T. K. Shemjakina},
     title = {Nikola{\v\i} {Pavlovich} {Erugin} (on the ninetieth anniversary of his birth)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {579--582},
     publisher = {mathdoc},
     volume = {33},
     number = {5},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_5_a0/}
}