Rahman, Nisar- ur-, Syed Saeed-ul- Hassan, and Uzma Niaz. 2005. “IMPROVED HIGH PERFORMANCE LIQUID CHROMATOGRAPHIC ANALYSIS OF DILTIAZEM IN HUMAN PLASMA: Diltiazem in Human Plasma”. Pakistan Armed Forces Medical Journal 55 (3): 214-18. https://pafmj.org/PAFMJ/article/view/1255.