H. M. Severin

• Gold and Platinum Coinage of Imperial Russia from 1701 to 1911
• Monety Rossiĭskoĭ imperii
• Zolotȳe i platinovȳe monetȳ rossiĭskoĭ imperii 1701-1911
• The silver coinage of Imperial Russia, 1682 to 1917