His description of the dialect of Buchan was an important contribution to Scottish dialectology.
The main areas of his works included dialectology and accentology of South Slavic languages, as well as philologically impeccable editions of 15th to 18th century writers for the Yugoslav Academy of Sciences and Arts edition "Stari pisci hrvatski"/Old Croatian Writers".
The authors of this edition were the linguists Otto Back, Erich Benedikt, Karl Blüml, Jakob Ebner and Hermann Möcker from the institute of Austrian studies (Institut für Österreichkunde), as well as the dialectogists Maria Hornung, Professor Heinz Dieter Pohl from the University of Klagenfurt and Emeritus professor Herbert Tatzreiter from the University of Vienna.
Hrytsenko is a specialist in dialectology of the Ukrainian language, typology of Slavic dialect systems, theory of linguistic geography, dialectal textology and textography, history of linguistics.