Cyrillic Writing Systems

http://www.gutenberg.eu.org/pub/GUTenberg/publicationsPDF/28-29-berdnikovb.pdf
This paper is an in deep explanation of the writing systems of russian, cyrillics outside Russia, bulgarian, macedonian, serbian, mongolian and others. It presents the alphabets for these languages and explains the behavior of letters in words, talking about also the formation of other symbols which are used in the daily communication.