IVANOV, Nikolay Nikolaevich; KOVALEV, Nikolay Vasilyevich. Development of Yacht Tourism in Saint-Petersburg and Leningrad Region. Administrative Consulting, [S. l.], n. 11, p. 181–185, 2013. Disponível em: https://administrative-consulting.owebs.ru/article/view/12493. Acesso em: 8 nov. 2026.