Reference Label	Details
Bradley 1953	R. S. Bradley and T. G. Cleasby, J. Chem. Soc. 1681-1684 (1953) The Vapour Pressure and Lattice Energy of Hydrogen-bonded Crystals. Part I. Oxamide, Oxamic Acid, and Rubeanic Acid
as quoted by Cox 1970	as quoted by Cox 1970