TY  - JOUR
TI  - Nikola{\v\i} Pavlovi{\v{c}} Erugin (on the occasion of his seventieth birthday)
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 961
EP  - 962
VL  - 13
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_5_a23/
LA  - ru
ID  - DE_1977_13_5_a23
ER  -