Diyar, and Dana Hamad Ameen. “Evaluatin The Effect of Primary Amine in Bitterness of Selected Cephalosporins”. Polytechnic Journal 13, no. 1 (September 20, 2023): 187-208. Accessed May 15, 2024. https://journals.epu.edu.iq/index.php/polytechnic/article/view/1357.