Michael H Palmer. (2004). The structures of the azido-, isocyanato- and isothiocyanato-derivatives of germane, stannane and plumbane and their trimethyl derivatives: a comparison of ab initio results with experiment, and with the methane and silane analogs. , 692(1-3), 43–56.
doi:10.1016/j.molstruc.2003.12.028