Relief Formation on the Plane: Principal Solutions, Investigation and Application for the Blind. Elektronika ir Elektrotechnika, [S. l.], v. 64, n. 8, p. 46–46, 2005. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/10539.. Acesso em: 5 dec. 2025.