Problems of learning Russian as a foreign language in a distance format at the pre-university stageMaria Vladimirovna Alimova, Daria Grigorievna Gutorova, Tatyana Viktorovna Kapshukova, Ekaterina Stanislavovna Kozlovskaya and Ivanna Ivanovna ProkopovaSHS Web Conf., 127 (2021) 01010DOI: https://doi.org/10.1051/shsconf/202112701010