Naumov, P., P. Naumov, M. Zugik, A. Lee, and S. W. Ng. “Spiroconjugation over a Boron Atom: Facile Synthesis, Structures and Vibrational Spectra of Crystalline 1,3-Disubstituted (propen-1,3-diolato)(oxalato)boron Molecules”. Macedonian Journal of Chemistry and Chemical Engineering, vol. 28, no. 1, June 2009, pp. 55-77, doi:10.20450/mjcce.2009.222.