JUŠKEVIČIENĖ, Anita. The mathematical model of computer keyboard . Lietuvos matematikos rinkinys, [S. l.], v. 50, n. proc. LMS, p. 196–201, 2009. DOI: 10.15388/LMR.2009.35. Disponível em: https://www.journals.vu.lt/LMR/article/view/17927.. Acesso em: 4 may. 2024.