MassaraR. E. and Al-NajjarA. R., ‘FDNR realization of all-pole lowpass filters’, IEE Proceedings, Pt. G., 128, No. 4, pp. 195–197 (1981).
2.
MassaraR. E. and Al-SaqerA. Y., ‘On the optimal design of FDNR-derived bandpass active filters’, Proc. 7th European Conference on Circuit Theory and Design — ECCTD '85, Prague, pp. 621–624 (Sept., 1985).