1. ‘Condensed phosphates and arsenates’;Thilo,1972
2. D. E. C. Carbridge, The structural chemistry of phosphorus compounds’ in M. Grayson E. J. Griffiths, Eds. Topics in Phosphoros Chemistry, Vol. VI, p 235 (1969). York (1966).
3. D. E. C. Carbridge, The infrared spectra of phosphorus compounds’, in M. Grayson and E. J. Griffith, Eds. Topics in Phosphorus Chemistry, Vol. VI, p 235 (1969).
4. ‘Condensed phosphates containing other oxo. acid anions’;Ohashi;Ibid.,1964