↑Cd(−2) have been observed (as dimeric and monomeric anions; dimeric ions were initially reported to be [T–T]2−, but later shown to be [T–T]4−) in Sr5Cd3; see Changhoon Lee; Myung-Hwan Whangbo; Jürgen Köhler (2010). "Analysis of Electronic Structures and Chemical Bonding of Metal-rich Compounds. 2. Presence of Dimer (T–T)4– and Isolated T2– Anions in the Polar Intermetallic Cr5B3-Type Compounds AE5T3 (AE = Ca, Sr; T = Au, Ag, Hg, Cd, Zn)". Zeitschrift für Anorganische und Allgemeine Chemie. 636 (1): 36–40. doi:10.1002/zaac.200900421.
↑Cd(I) has been observed in cadmium(I) tetrachloroaluminate (Cd2(AlCl4)2); see Holleman, Arnold F.; Wiberg, Egon; Wiberg, Nils (1985). "Cadmium". Lehrbuch der Anorganischen Chemie (Герман хэлээр) (91–100 хэвлэл). Walter de Gruyter. х. 1056–1057. ISBN978-3-11-007511-3.
↑Лиде, Д. Р., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Хими, физикийн гарын авлага(PDF) (86-р хэвлэл). Бока Ратон (Флорида): CRC Press. ISBN0-8493-0486-5.
↑Вэст, Роберт (1984). CRC, Хими, физикийн гарын авлага. Бока Ратон, Флорида: Chemical Rubber Company Publishing. х. E110. ISBN0-8493-0464-4.