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Byurakan Astrophysical Observatory. Translated from Astrofizika, Vol. 33, No. 1, pp. 47–55, July–August, 1990.
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Oskanyan, A.V. Regions of active star formation in O associations. I. Astrophysics 33, 319–324 (1990). https://doi.org/10.1007/BF01005994
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DOI: https://doi.org/10.1007/BF01005994