LYMAN, I. ., and V. KONSTANTINOVA. “NETWORK FORMATION OF THE PRUSSIAN CONSULAR OFFICES IN UKRAINIAN LANDS IN THE 19TH CENTURY: CASE STUDY OF THE PORT CITY OF KERCH”. EAST EUROPEAN HISTORICAL BULLETIN, no. 18, Mar. 2021, pp. 45-54, doi:10.24919/2519-058X.18.226514.