TY - JOUR T1 - A Church Slavonic graffito in Hagia Sophia in Constantinople JF - Harvard Ukrainian Studies Y1 - 1981 A1 - Kalavrezou-Maxeiner, Ioli A1 - Obolensky, Dimitri VL - 5 UR - http://projects.iq.harvard.edu/huri/files/vv_n1march1981.pdf IS - 1 ER -