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Books about Natanzon:
Moduli of Riemann Surfaces, Real Algebraic Curves, and Their Superanalogs (Translations of Mathematical Monographs... (Aug 3, 2004)
COMBUSTION INSTABILITY (Progress in Astronautics and Aeronautics) [Hardcover]  (Author) M. S. Natanzon (2008)
Wiki information Natanzon:
Matvey Natanzon is the highest ranked backgammon player in the world.