Bailey, N.; Carrington, A.; Lott, K.A.K.; Symons, M.C.R (1960). “Structure and Reactivity of the Oxyanions of Transition Metals Part VII: Acidities and Spectra of Protonated Oxyanions”. 《Journal of the Chemical Society (Resumed)》: 290-7. doi:10.1039/JR9600000290.