TY - JOUR AU - I. N. Shnurnikov TI - On the Number of Regions Formed by Arrangements of Closed Geodesics on Flat Surfaces JO - Matematičeskie zametki PY - 2011 SP - 637 EP - 640 VL - 90 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2011_90_4_a12/ LA - ru ID - MZM_2011_90_4_a12 ER -