TY - JOUR AU - L. N. Romakina TI - Oval lines of the hyperbolic plane of positive curvature JO - Izvestiya of Saratov University. Mathematics. Mechanics. Informatics PY - 2012 SP - 37 EP - 44 VL - 12 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ISU_2012_12_3_a5/ LA - ru ID - ISU_2012_12_3_a5 ER -