PONKIN, Igor; PONKINA, Alyena. World Summer Universiade – the test for quality control. Gosudarstvennaya Sluzhba, [S. l.], v. 15, n. 3, p. 20–22, 2013. Disponível em: https://gosudarstvennaya-sluzhba.owebs.ru/article/view/21739. Acesso em: 9 nov. 2026.