@article {Kalavrezou-Maxeiner1981,
	title = {A Church Slavonic graffito in Hagia Sophia in Constantinople},
	journal = {Harvard Ukrainian Studies},
	volume = {5},
	year = {1981},
	pages = {5 {\textendash} 11},
	url = {http://projects.iq.harvard.edu/huri/files/vv_n1march1981.pdf},
	author = {Kalavrezou-Maxeiner, Ioli and Obolensky, Dimitri}
}
