Bott, S., Xia, C., Bott, S., Wu, G., & Richmond, M. (2004). Reaction of the dicobalt alkyne compound Co2(CO)6( -dmad) with the diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Spectroscopic properties, X-ray diffraction data, and thermal reactivity of the chelating isomer of Co2(CO)4(bpcd)( -dmad). Journal of Chemical Crystallography, 34(8), pp. 513-521. doi:10.1023/B:JOCC.0000042019.54785.9a

Bott, Simon, CG Xia, SG Bott, GM Wu, and MG Richmond. "Reaction of the Dicobalt Alkyne Compound Co2(CO)6( -dmad) With the Diphosphine Ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Spectroscopic Properties, X-ray Diffraction Data, and Thermal Reactivity of the Chelating Isomer of Co2(CO)4(bpcd)( -dmad)." Journal of Chemical Crystallography 34, no. 8 (2004): 513-521.

Bott, Simon, et al. "Reaction of the Dicobalt Alkyne Compound Co2(CO)6( -dmad) With the Diphosphine Ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Spectroscopic Properties, X-ray Diffraction Data, and Thermal Reactivity of the Chelating Isomer of Co2(CO)4(bpcd)( -dmad)." Journal of Chemical Crystallography 34.8 (2004): 513-521.