TY  - BOOK
AU  - Nijmeijer H Ed.
AU  -  Schumacher J M
TI  - Three decades of mathematical system theory: a collection of surveys at the occasion of the 50th birthday of jan c . willems
T2  - Lecture notes in control and information Sciences; 135
U1  - B289M, M9 
PY  - 1989///
CY  - Berlin
PB  - Springer-Verlag         
ER  -