ÉRDI, B.; SZENKOVITS, Ferenc. INTERNATIONAL CONFERENCE ON ACTUAL PROBLEMS IN CELESTIAL MECHANICS AND DYNAMICAL ASTRONOMY. [s.l.] : Presa Universitară Clujeană,2008. Disponível em: https://editura.ubbcluj.ro/index.php/puc/catalog/book/699. Acesso em: 15 may. 2026.