Michael Meier-Brügger: Indo-European linguistics. Walter de Gruyter, Berlin and New York 2003, p. 28 (online on Google books): "The Macedonian of the ancient kingdom of northern Greece is probably nothing other than a northern Greek dialect of Doric".
Brian D. Joseph: "Ancient Greek". In: J. Garry et al. (eds.): Facts about the world's major languages: an encyclopedia of the world's major languages, past and present.Online paperArchived 2016-10-01 at the Wayback Machine, 2001.
Brian D. Joseph: "Ancient Greek". In: J. Garry et al. (eds.): Facts about the world's major languages: an encyclopedia of the world's major languages, past and present.Online paperArchived 2016-10-01 at the Wayback Machine, 2001.