Gmelin Os.Organ.Vbg. Tl B (closed) 3 (Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th edition)
Fuessel, Johannes/Behrends, K./Fuessel, Johannes/Kaempf, P./Nohl, U./Arnim, Henning v./Behrens, U./Edelmann, Frank T./Ohms-Bredemann, Ulrike/Olms-Keller, P.