TY  - BOOK
AU  - Gessner P
AU  -  Spremann K
TI  - Optimierung in funktioninraumen
T2  - Lecture notes in economics and mathematical systems; 64
U1  - B2893-43, 113L2 
PY  - 1972///
CY  - Berlin
PB  - Springer-Verlag       
KW  - Operational research
ER  -