TY  - JOUR
AU  - L. V. Zhizhiashvili
AU  - D. E. Men'shov
AU  - S. M. Nikol'skii
TI  - Petr Lavrent'evich Ul'yanov (on his sixtieth birthday)
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1988
SP  - 253
EP  - 264
VL  - 43
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1988_43_4_a32/
LA  - en
ID  - RM_1988_43_4_a32
ER  -