Huda Anjum, Naima Farooq, Saman Sheraz, Ghulam Saqulain, and Haddiqa Adnan. “Post-Laparotomy Pulmonary Complications in Blow Bottle Versus Interdigital Breathing Technique: A Quasi-Experimental Study”. Pakistan Armed Forces Medical Journal 74, no. 4 (August 30, 2024): 1088–1093. Accessed June 13, 2025. https://www.pafmj.org/PAFMJ/article/view/6715.