S. Gevrey, A. Luna, V. Haldys, J. Tortajada, J. P. Morizur: Experimental and theoretical studies of the gas-phase protonation of orthophosphoric acid. The Journal of Chemical Physics, 1998, 108. vsk, nro 6. doi:10.1063/1.475628Bibcode:1998JChPh.108.2458G
S. Gevrey, A. Luna, V. Haldys, J. Tortajada, J. P. Morizur: Experimental and theoretical studies of the gas-phase protonation of orthophosphoric acid. The Journal of Chemical Physics, 1998, 108. vsk, nro 6. doi:10.1063/1.475628Bibcode:1998JChPh.108.2458G