TY  - BOOK
AU  - Fucik S
AU  -  Necas J
AU  -  Soucek J
AU  -  Soucek V
TI  - Spectral analysis of nonlinear operators
T2  - Lecture notes in mathematics; 346
U1  - B48, L3 
PY  - 1973///
CY  - Berlin
PB  - Springer-Verlag         
ER  -