Letters to the editor on the design of ota-c structurally allpass filters. - Tertulien Ndjountche; A. Avebe Zibi (Int. J. Circuit Theory Appl., 1995)

Adaptive switched capacitor biquadratic filter with high-frequency applications. - Tertulien Ndjountche; A. Avebe Zibi (Int. J. Circuit Theory Appl., 1996)