TY - JOUR AU - I. Kh. Sabitov TI - Hyperbolic Tetrahedron: Volume Calculation with Application to the Proof of the Schl\"afli Formula JO - Modelirovanie i analiz informacionnyh sistem PY - 2013 SP - 149 EP - 161 VL - 20 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAIS_2013_20_6_a13/ LA - ru ID - MAIS_2013_20_6_a13 ER -