SEVERDAKS, A.; LIEPINS, M. Vehicle Counting and Motion Direction Detection Using Microphone Array. Elektronika ir Elektrotechnika, [S. l.], v. 19, n. 8, p. 89-92, 2013. DOI: 10.5755/j01.eee.19.8.5400. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/5400. Acesso em: 30 sep. 2020.