ČYRAS, Vytautas. Modelling of concepts "purpose", "goal", "task", and "function" in law. Lietuvos matematikos rinkinys, [S. l.], v. 44, n. spec., p. 250–255, 2004. DOI: 10.15388/LMR.2004.31643. Disponível em: https://www.zurnalai.vu.lt/LMR/article/view/31643. Acesso em: 6 nov. 2025.