TY  - JOUR
AU  - V. M. Finkel'shtein
TI  - Certain classes of four-parameter direction fields connected with a~non-holonomic surface orthogonal to an arbitrary congruence
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1967
SP  - 109
EP  - 116
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1967_6_a13/
LA  - ru
ID  - IVM_1967_6_a13
ER  -