TY - BOOK AU - Farkas M ED - Colloquium on Qualitative theory of differential equations( 1979 : Szeged ) ED - Colloquium on Qualitative theory of differential equations TI - Qualitative theory of differential equations U1 - 515.35 PY - 1981/// CY - Amsterdam PB - North Holland KW - Calculus KW - Differential equations ER -