Bott, S., CARNAHAN, E., RARDIN, R., BOTT, S., & LIPPARD, S. (1992). Synthesis and characterization of seven-coordinate tantalum(I) and niobium(I) complexes with cis carbonyl and alkyl isocyanide ligands. Inorganic Chemistry, 31(25), pp. 5193-5201. doi:10.1021/ic00051a009

Bott, Simon, EM CARNAHAN, RL RARDIN, SG BOTT, and SJ LIPPARD. "Synthesis and Characterization of Seven-coordinate Tantalum(I) and Niobium(I) Complexes With Cis Carbonyl and Alkyl Isocyanide Ligands." Inorganic Chemistry 31, no. 25 (1992): 5193-5201.

Bott, Simon, et al. "Synthesis and Characterization of Seven-coordinate Tantalum(I) and Niobium(I) Complexes With Cis Carbonyl and Alkyl Isocyanide Ligands." Inorganic Chemistry 31.25 (1992): 5193-5201.