David Eggerding and Robert West (1976), Synthesis and properties of deltic acid (dihydroxycyclopropenone) and the deltate ion. J. American Chemical Society, volume 98, p, 3641-3644. doi:10.1021/ja00428a043.
David Eggerding, Robert West (1975), Synthesis of dihydroxycyclopropenone (deltic Acid). J. American Chemical Society, volume 97, issue 1, pp 207-208. doi:10.1021/ja00834a047.
Johannes Beck and Petra Krieger-Beck (2006), Crystal structure of 1,2-bis(cyanoimino)-3-triethylammonio-cyclopropenylide. Analytical Sciences, volume 22, page x239. doi:10.2116/analscix.22.x239.
M. T. Reetz, G. Neumeier, and M. Kaschube (1975), Thermische umlagerung von quadratsaure-bis(trimethylsilyl)ester. Tetrahedron Letters, page 1295. doi:10.1016/S0040-4039(00)72653-0.
Owen T. Summerscales, F. Geoffrey N. Cloke, Peter B. Hitchcock, Jennifer C. Green, Nilay Hazari (2006), Reductive cyclotrimerization of carbon monoxide to the deltate dianion by an organometallic uranium complex. Science, volume 311, issue 5762 (10 February 2006), pp. 829 - 831. doi:10.1126/science.1121784.