Vodnye puti i sudostroenie na Severo-Zapade Rusi v srednevekov'e - Sorokin, Petr Egorovič 1962- (Izdat. S.-Peterburgskogo Univ., 1997)
In kyrill. Schr., russ. - Zsfassung in engl. Sprache u.d.T.: Water-ways and shipbuilding in North-Western Russia in middle ages