Geier, J., Willner, H., Lehmann, C. W., & Aubke, F. (2007). Formation of hexacarbonylmanganese(I) salts, [Mn(CO)₆]⁺X⁻, in anhydrous HF. Inorganic Chemistry, 46, 7210-7214. doi:10.1021/ic700798z.