Columbia subject headings:
Kovalevskai︠a︡, S. V. (Sofʹi︠a︡ Vasilʹevna), 1850-1891.
Harvard subject headings:
Kovalevskai︠a︡, S. V. (Sofʹi︠a︡ Vasilʹevna), 1850-1891.
Princeton subject headings: