Goldblatt, Harvey.
Orthography and orthodoxy: Constantine Kostenečki’s Treatise on the letters : (Skazánїe ízьjávljénno ō písmenex) /
Harvey Goldblatt 
. - Firenze : Le Lettere,  1987 
. - ix, 428 p.  24 cm. 
 - Studia historica et philologica  16 .
<br/><br/> Резюме італ., рос. : с. 409-428.
<br/><br/><label>Subjects--Personal Names: </label><br/>Konstantin philosopher  15th cent.  Сказание избавленно о письменах