Md Khairi, L. N. H., W. A. Wan Zakaria, M. Mukhtar, M. F. Sopi, S. . Gnanasan, and A. Samsudin. “A Phenomenological Study of Barriers to Smoking Cessation Among Patients With Chronic Obstructive Pulmonary Disease in Malaysia”. Journal of Pharmacy, vol. 6, no. 1, Jan. 2026, pp. 7-20, doi:10.31436/jop.v6i1.396.