TY  - JOUR
TI  - Greetings to L.\,S.~Pontryagin on his seventieth birthday
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1983
SP  - 142
VL  - 38
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1983_38_6_a19/
LA  - en
ID  - RM_1983_38_6_a19
ER  -