Comparison of Two 12-Key Assignments on Mobile Devices. Elektronika ir Elektrotechnika, [S. l.], v. 108, n. 2, p. 97–102, 2011. DOI: 10.5755/j01.eee.108.2.153. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/153.. Acesso em: 5 dec. 2025.