V. V. Saraev, P. B. Kraikivskii, I. Svoboda, A. S. Kuzakov, R. F. Jordan (2008). «Synthesis, Molecular Structure, and EPR Analysis of the Three-Coordinate Ni(I) Complex [Ni(PPh3)3][BF4]». J. Phys. Chem. A. 112: 12449–12455. doi:10.1021/jp802462x !CS1 manut: Usa parâmetro autores (link)