WAI, M. P. P.; SUWANJAN, P.; JAIKLA, W.; CHAICHANA, A. Electronically and Orthogonally Tunable SITO Voltage-Mode Multifunction Biquad Filter Using LT1228s. Elektronika ir Elektrotechnika, [S. l.], v. 1, n. 1, 2021. DOI: 10.5755/j02.eie.28949. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/28949. Acesso em: 15 oct. 2021.