R. Boite and P. Dewilde.European Conference on Circuit Theory and Design (1981 : The Hague)：Circuit theory and design; proceedings of the 1981European Conference on Circuit Theory and Design.North-Holland Pub. Co.,1981.
European Conference on Circuit Theory and Design (1981 : The Hague)：Circuit theory and design; proceedings of the 1981European Conference on Circuit Theory and Design
R. Boite and P. Dewilde.North-Holland Pub. Co.,1981.
