TY  - JOUR
AU  - L. N. Romakina
TI  - Analogs of a formula of Lobachevsky for angle of parallelism on the hyperbolic plane of positive curvature
JO  - Sibirskie èlektronnye matematičeskie izvestiâ
PY  - 2013
SP  - 393
EP  - 407
VL  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SEMR_2013_10_a28/
LA  - ru
ID  - SEMR_2013_10_a28
ER  -