RUDALEVIČIENĖ, Regina; KAŠUBA, Romualdas. Several simple remarks concerning the attractiveness and usefulness of “Kangaroo” problems. Lietuvos matematikos rinkinys, [S. l.], v. 52, n. proc. LMS, p. 134–139, 2011. DOI: 10.15388/LMR.2011.me15. Disponível em: https://journals.vu.lt./LMR/article/view/15391. Acesso em: 19 apr. 2025.