Exner, O., Fiedler, P., Saman, D., & Tinant, B. (1989). Physical-properties and Structure of 2-nitro-2-nitrosopropane and its Dimer. Journal of Molecular Structure, 195, 335-342. https://doi.org/10.1016/0022-2860(89)80180-2 (Original work published 1989)