TY  - JOUR
AU  - S. P. Novikov
TI  - Algebro-topological approach to reality problems. Real action variables in the theory of finite-gap solutions of the Sine-Gordon equations
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1984
SP  - 177
EP  - 196
VL  - 133
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1984_133_a12/
LA  - ru
ID  - ZNSL_1984_133_a12
ER  -