EN
Theoretical basics of typological classification of the phonological systems of Slavonic languages were based by A. Isačenko at the end of thirties of 20th century. It is a pity that in the next years his ideas were not developed, which was caused maybe by the fact that phonological typology was always marginal interest for linguists, while dominant position in language typology had morphological typology. Our confrontational description is concentrated on similar analyses of relations between vocalic and consonant phonemes of the Serbian and Croatian languages but is based on broader Slavonic background. In our text we are continuing our research work devoted to confrontational study of the phonological systems of standard Slovak, Czech, Polish, Upper Sorbian, Lower Sorbian, Byelorussian, Ukrainian, Russian and Bulgarian languages.