If you are looking for specific exercise solutions (GDZ), these are typically found on educational portals or by downloading the PDF version of the "Home Tutor" series from sites like Alleng . Д. Э. Розенталь И. Б. Голуб
Contains texts for dictation to allow users to self-test their literacy levels. If you are looking for specific exercise solutions
The authors also collaborated on (with M.A. Telenkova), which is a broader academic manual covering phonetics, lexicology, morphology, and syntax. If you are looking for specific exercise solutions
Includes training exercises designed to develop and reinforce correct writing habits. If you are looking for specific exercise solutions
Covers the principles of Russian spelling, including the use of vowels and consonants in roots, prefixes, and suffixes, hyphenation rules, and capitalization.