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Additional information
Byurakan Astrophysical Observatory. Translated from Astrofizika, Vol. 15, No. 2, pp. 209–216, April–June, 1979.
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Petrosyan, A.R., Saakyan, K.A. & Khachikyan, É.E. Spectral study of galaxies with ultraviolet excess and double and multiple nuclei. I. Astrophysics 15, 142–147 (1979). https://doi.org/10.1007/BF01006034
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DOI: https://doi.org/10.1007/BF01006034