TY  - BOOK
AU  - Encyclopedia of Mathematics and its applications
AU  - Aczel, J. 
AU  - Dhombres, J.
TI  - Functional equations in several variables with applications to mathematics, information theory and to the natural and social sciences
T2  - Encyclopedia of Mathematics and its applications
U1  - 510.3 
PY  - 1989///
CY  - Cambridge
PB  - Cambridge University Press
ER  -