TY  - JOUR
AU  - G. A. Freiman
TI  - Inverse problems of additive number theory. VII. The addition of finite sets. IV. The method of trigonometric sums
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1962
SP  - 131
EP  - 144
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1962_6_a15/
LA  - ru
ID  - IVM_1962_6_a15
ER  -