Daniel (R.W.), GNOMON, LVI, 1984, PP. 415- 419., English

1980 Bagnall (Roger S.) Sijpesteijn (Pieter Johannes) Worp (Klaas Anthony) GREEK OSTRAKA. A CATALOGUE OF THE COLLECTION OF GREEK OSTRAKA IN THE NATIONAL MUSEUM OF ANTIQUITIES AT LEIDEN, WITH A CHAPTER OF THE GREEK OSTRAKA IN THE PAPYROLOGICAL INSTITUTE OF THE UNIVERSITY OF LEIDEN. 2 VOL., XII- 233 P., 100 PL.