Djurić, V. R., V. D. Mitić, N. R. Deletić, M. D. Ilić, B. M. Ćirković, and V. P. Stankov-Jovanović. “A Novel Kinetic Cholinesterase-Inhibition Based Method for Quantification of Biperiden in Pharmaceutical Preparations”. HEMIJSKA INDUSTRIJA (Chemical Industry), vol. 74, no. 4, Sept. 2020, pp. 265-71, doi:10.2298/HEMIND200413021D.