However, according to Riki van Boeschoten, the Slavic dialects of Eastern Greek Macedonia are closer to Bulgarian, and the Central dialect used in the area between Edessa and Salonica is an intermediate between Macedonian and Bulgarian. Peter Trudgill also classifies certain peripheral dialects in the far east of Greek Macedonia as part of the Bulgarian language area. Victor Friedman considers those Macedonian dialects, spoken east from Kilkis, to be transitional to the Bulgarian language.
