Gurzadyan, G.A; Ohanesyan, J.B. (1972). «Observed Energy Distribution of alpha Lyra and beta Cen at 2000-3800 Å». Nature239 (5367): 90. doi:10.1038/239090a0. Bibcode: 1972Natur.239...90G.
Gurzadyan, G.A. (1976). «Two-photon emission in planetary nebula IC 2149». Publications of the Astronomical Society of the Pacific88: 891. doi:10.1086/130041. Bibcode: 1976PASP...88..891G.
Gurzadyan, G.A; Ohanesyan, J.B. (1972). «Observed Energy Distribution of alpha Lyra and beta Cen at 2000-3800 Å». Nature239 (5367): 90. doi:10.1038/239090a0. Bibcode: 1972Natur.239...90G.
Gurzadyan, G.A. (1976). «Two-photon emission in planetary nebula IC 2149». Publications of the Astronomical Society of the Pacific88: 891. doi:10.1086/130041. Bibcode: 1976PASP...88..891G.