Evan E. Bolton; Yanli Wang; Paul A. Thiessen; Stephen H. Bryant (2008). „Chapter 12 PubChem: Integrated Platform of Small Molecules and Biological Activities”. Annual Reports in Computational Chemistry. 4: 217—241. doi:10.1016/S1574-1400(08)00012-1.
Li, L.-C.; Shang, J.; Liu, J.-L.; Wang, X.; Wong, N.-B. (2007). „A G3B3 study of N4H4 isomers”. Journal of Molecular Structure. 807 (1–3): 207—10. doi:10.1016/j.theochem.2006.12.009.