Helgason, S. (1962). Differential geometry and symmetric spaces. New York: Academic Press.
Παραπομπή Chicago StyleHelgason, Sigurdur. Differential Geometry and Symmetric Spaces. New York: Academic Press, 1962.
Παραπομπή MLAHelgason, Sigurdur. Differential Geometry and Symmetric Spaces. New York: Academic Press, 1962.
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