Kostyukov V.V., Nirka V.V., Fedotov D.E., Karlitsky I.N., and Kostyukova O.N. “Russian Beach Volleyball at the Olympic Games: Results, Problems, Prospects”. Theory and Practice of Physical Culture, no. 11, Nov. 2023, pp. 3-6, http://tpfk.ru/index.php/TPPC/article/view/802.