So I made a web search with what was given and now I’m confused: I found and added a link for “LaTeX 2e по-русски (2004) by И. Котельников and П. Чеботаев”, but there is also
labirint.ru/books/277560 with a
commercial version of 2011. Do you have any chance to ask other, Russian speaking moderators for help (isn’t there a “Russian language and usage”?), whether the version of 2004 is in fact also commercial and so the link illegal?