Jankulovska, M. S., L. Šoptrajanova, and I. Spirevska. “Behaviour of Glutaconic and Aconitic Acid in Sulfuric Acid Medium”. Macedonian Journal of Chemistry and Chemical Engineering, vol. 25, no. 2, Dec. 2006, pp. 89-97, doi:10.20450/mjcce.2006.290.