24. D. M. Metcalf, Coinage in South-Eastern Europe 820-1396, Royal Numismatic Society, Special Publication no. 11, London 1979, XII +371 (-374) pp., 24 fig., 8 cartes et 36 tableaux dans le texte, 6 pl. hors texte, în Byzantinoslavica - Revue Internationale des Etudes Byzantines, XLIII, 1982, p. 227-229.
