Development and implementation of blended courses for Russian language teachers in Russia and abroadTatyana Malykhina, Sergey Zolotykhin, Lyudmila Larina, Alevtina Kuzmina and Tatyana PravednikovaSHS Web Conf., 69 (2019) 00142DOI: https://doi.org/10.1051/shsconf/20196900142