Note 180 — Chapter IX · THE BALKAN PENINSULA AND ITS SERBIAN INHABITANTS
Reading edition
Serbian authorities usually extend the zone of their vernacular to points farther east. Cf. J. Cvijić: Die ethnographische Abspreuzung der Völker auf der Balkan-halbinsel, Pet. Mitt., Vol. 59, 1913, No. 1, pp. 113-118.