Jankulovska, M., I. Spirevska, and K. Čolančevska-Ragenović. “Behaviour of Some Newly Synthesized Substituted 1,2,4-Triazoline-3-Thiones in Sulfuric Acid Media”. Macedonian Journal of Chemistry and Chemical Engineering, vol. 25, no. 1, June 2006, pp. 29–37, doi:10.20450/mjcce.2006.276.