TY - JOUR AU - A. P. Djotyan AU - A. A. Avetisyan TI - Excitonic absorption in gapped graphene systems JO - Proceedings of the Yerevan State University. Physical and mathematical sciences PY - 2017 SP - 93 EP - 96 VL - 51 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UZERU_2017_51_1_a16/ LA - en ID - UZERU_2017_51_1_a16 ER -