Shabir, I., M. S. Zainab, R. Farooq, S. Rasool, M. U Rehman, and S. Majid. “Plasmaelectrolytes and Blood Gases in Patients With Chronic Obstructive Pulmonary Disease”. Caribbean Journal of Sciences and Technology, vol. 6, no. 1, Dec. 2018, pp. 76-79, https://caribjscitech.com/index.php/cjst/article/view/22.