LYGIS , D. The investigation of attention properties in normal and abnormal children. Psichologija, [S. l.], v. 2, p. 41–51, 1981. DOI: 10.15388/Psichol.1981.2.9180. Disponível em: https://test.zurnalai.vu.lt/psichologija/article/view/9180. Acesso em: 25 oct. 2025.