The origins of the Old Rus' weights and monetary systems. Two studies in Western Eurasian metrology and numismatics in the seventh to eleventh centuries
E. Muhle, The origins of the Old Rus' weights and monetary systems. Two studies in Western Eurasian metrology and numismatics in the seventh to eleventh centuries, JAHRB GESCH, 48(1), 2000, pp. 144-145