○Hyperbolic Triangle Centers: The Special Relativistic Approach (Fundamental Theories of Physics) h33(管理番号) - 数学
○Hyperbolic Triangle Centers: The Special Relativistic Approach (Fundamental Theories of Physics) h33(管理番号) - 数学,Ptolemy’s Theorem in the Relativistic Model of Analytic Hyperbolic Geometry,File:Hyperbolic triangle.svg - Wikipedia,Coxeter decompositions of hyperbolic polygons - Wikipedia,Complex Analysis and Special Functions