1. Combier, R., Brochot, A.: Action de l’aldehyde forique sur les amines et sur leurs sels. Bull. Soc. Chim. France (3) 13, 392–398 (1895).
2. Delepine, M.: Sur l’hexamethylene-amine (suite). Solubilities, hydrate, bromure, sulfate, phosphate. Bull. Soc. Chim. France (3) 13, 352–361 (1895).
3. Delepine, M.: Hexamethylene-amine: sels et hydrate. Thermochemie. Bull. Soc. Chim. France (3) 17, 110–113 (1897).
4. Mak, T.C.W.: Hexamethylenetetramine hexahydrate: a new type of clathrate hydrate. J. Chem. Phys. 43(8), 2799–2805 (1965).
5. Walker, J.F.: Formaldehyde, 3rd edn. Reinhold Publishing Corporation, New York, (1964), p. 524.