Türker, L. “Cis- and Trans-2,5,7,9-Tetranitro-2,5,7,9-tetraazabicyclo[4,3,0]nonan-8-One and Some of Its Isomers-A DFT Treatise ”. Earthline Journal of Chemical Sciences, Vol. 4, no. 2, May 2020, pp. 77-88, doi:10.34198/ejcs.4220.7788.