%0 Journal Article %A N. G. Aharonyan %T Pleijel type identities %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2009 %P 32-37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2009_2_a5/ %G en %F UZERU_2009_2_a5