M. N. Rashid, Z. Laghari, L. Riaz, B. Noman, R. A. Khan, and A. M. Soomro, “SPUTUM CULTURE AND POLYMERASE CHAIN REACTION TESTS FOR IDENTIFICATION OF BACTERIAL PATHOGENS IN EXACERBATION OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE”, Pak J Phsyiol, vol. 18, no. 1, pp. 39–43, Mar. 2022.