Vrublevskaya, E. G., and A. A. Artyukhina. “Professional Pedagogical Olympiads As a Type of Informal Education and a Means of Developing Pedagogical Skills”. Pedagogika, vol. 90, no. 3, Mar. 2026, pp. 54-63, https://ojs.owebs.ru/pedagogika/article/view/30549.