BALAŠEVIČIUS, L.; JANUŠEVIČIUS, V. S.; ZAKARAITĖ, S. State Controller Design in Programmable Logic Controllers. Elektronika ir Elektrotechnika, [S. l.], v. 81, n. 1, p. 19–22, 2008. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/11026.. Acesso em: 3 mar. 2026.