Kauffman, George B.; Takahashi, Lloyd T.; Sugisaka, Nobuyuki (1966). "Resolution of the Trioxalatocobaltate(III) Ion". Inorganic Syntheses. 8: 207–211. doi:10.1002/9780470132395.ch55.
Worrell, J. H.; Kipp, E. B. (1972). "Resolution of the (Ethylenediamine)bis(oxalato)cobaltate(III) Ion". Inorganic Syntheses. 13: 195–202. doi:10.1002/9780470132449.ch40.