MAUNDY, Brent; ELWAKIL, Ahmed; BELOSTOTSKI, Leonid a HERENCSÁR, Norbert. Single transistor RC-only second-order allpass filters. Online. International Journal of Circuit Theory and Applications. 2020, vol. 48, no. 2, s. 162-169. ISSN 1097-007X. Dostupné z: https://doi.org/10.1002/cta.2721. [cit. 2025-04-08].