PENKAUSKAS, A. The effectiveness of different density signal stimuli perception from different distances. Psichologija, [S. l.], v. 7, p. 49–62, 1965. DOI: 10.15388/Psichol.1965.7.8909. Disponível em: https://www.journals.vu.lt/psichologija/article/view/8909.. Acesso em: 4 may. 2024.