H.-S. Shi, J. Qian, J. Fan, N. Deng, and K. Shu, “Solvothermal Synthesis and Crystal Structure of A Supramolecular Compound Tris(tert-butylamino)chlorophosphonium Chloride”, ajc, vol. 25, no. 4, pp. 2229–2231, Nov. 2012.