Rolling simplexes and their commensurability. IV. (A farewell to arms!)
O. V. Gerasimova, Yu. P. Razmyslov

References
1.	Gerasimova O. V., Pogudin G. A., Razmyslov Yu. P., “Rolling simplexes and their commensurability. III (sootnosheniya Kapelli i ikh primeneniya v differentsialnykh algebrakh)”, Fundament. i prikl. matem., 19:6 (2014), 7–24
2.	Shafarevich I. R., Osnovy algebraicheskoi geometrii, MTsNMO, M., 2007