LANGHAMMER, L.; SOTNER, R.; DVORAK, J.; DOSTAL, T. Fully-Differential Multifunctional Electronically Configurable Fractional-Order Filter with Electronically Adjustable Parameters. Elektronika ir Elektrotechnika, [S. l.], v. 24, n. 5, p. 42-45, 2018. DOI: 10.5755/j01.eie.24.5.21841. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/21841. Acesso em: 28 sep. 2022.