1.
Hyperbolic Functions With Configuration Theorems and Equivalent and Equidecomposable Figures
by Shervatov, V. G., Argunov, ...
ISBN: 9780486458861
List Price: $10.95
2.
Geometricheskie Postroeniya Na Ploskosti (Russian Edition)
by B. I. Argunov
ISBN: 9785458265331
List Price: $34.95