TY  - JOUR
AU  - S. A. Vavilov
AU  - D. A. Ovsyannikov
TI  - Applicability of one-particle approximation in a problem of the evolution of beams of charged particles in a longitudinal magnetic field
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 1183
EP  - 1187
VL  - 25
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_7_a11/
LA  - ru
ID  - DE_1989_25_7_a11
ER  -