O. N Levko

title	ISBN-13 (ISBN-10)	year of publication
Srednevekovoe goncharstvo severo-vostochnoĭ Belorussii	978-5-343-01041-1 (5-343-01041-5)	1992
Torgovye svi͡a︡zi Vitebska v X-XVIII vv	978-5-343-00171-6 (5-343-00171-8)	1989