SOTNER, R.; JERABEK, J.; DOSTAL, T.; VRBA, K. Z-copy Voltage Controlled Current Follower Differential Input Transconductance Amplifier in Controllable Biquadratic Band-Pass Filter. Elektronika ir Elektrotechnika, [S. l.], v. 22, n. 4, p. 32 - 36, 2016. DOI: 10.5755/j01.eie.22.4.15911. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/15911. Acesso em: 1 mar. 2021.