1. Redmore, D. 1976.Topics in Phosphorus Chemistry, Edited by: Griffith, E. J. and Grayson, M. Vol. 8, 515N. Y.: John Wiley & Sons.
2. The Direct Synthesis of α-Aminomethylphosphonic Acids. Mannich-Type Reactions with Orthophosphorous Acid
3. A Novel Synthesis of Aminomethylphosphonic Acid
4. Redmore, D. and Welge, F. T. reporting that cyclohexylamine with one equivalent of H3PO3and formaldehyde gave approximately equal amounts of mono- and bismethylenephosphonic acids, Ref 1, footnote 53 cited unpublished work of
5. For2athe pKavalues at 25°C in 0.1 M KNO3are 3.02, 5.94, 8.24, 11.03