^Hanauer, Tobias; Korber, Nikolaus. Dibismuthide Bi22-: Synthesis and crystal structure of bis[(1,4,7,10,13,16-hexaoxacyclooctadecane)cesium]dibismuthide-ammonia (1:7) [Cs(18-crown-6)]2Bi2·7NH3. Zeitschrift fuer Anorganische und Allgemeine Chemie (2004), 630 (13-14), 2532-2534. doi:10.1002/zaac.200400088.
^Kuznetsov, Alexei N.; Fassler, Thomas F. Bismuth Polyanions in Solution: Synthesis and Structural Characterization of (2, 2, 2-crypt-A)2Bi4 (A = K, Rb) and the Formation of the Laves Phases ABi2 (A = K, Rb, Cs) from Solution. Zeitschrift fuer Anorganische und Allgemeine Chemie (2002), 628(11), 2537-2541. doi:10.1002/1521-3749(200211)628:11<2537::AID-ZAAC2537>3.0.CO;2-A.