GEDUTIS, Aldis. The Long Awaited Workbook in Logic. Problemos, [S. l.], v. 61, p. 170–171, 2002. DOI: 10.15388/Problemos.2002.61.6747. Disponível em: https://www.journals.vu.lt/problemos/article/view/6747.. Acesso em: 28 apr. 2024.