Shlyapnikov, A. .; Gorbunov, M.; Gоrbachev M. .; Akmetdinov, R. Archives of CrAO Spectral Observations. Catalogues of Objects and Images. Acta Astrophys. Tau. 2020, 1 (1), 23-29. https://doi.org/10.31059/aat.vol1.iss1.pp23-29.