TY  - BOOK
AU  - Novikov S P
AU  -  Gelfand I M
AU  -  Matveer V B
TI  - Integrable systems: selected papaers
T2  - London mathematical society lecture note series; 60
U1  - B33, M12 
PY  - 1981///
CY  - London
PB  - Cambridge University Press       
KW  - Differential equations
ER  -