E. Kaszuba, H. Odeberg, L. Råstam, A. Halling, and С. О. Шурпяк, “Impact of Heart Failure and Other Comorbidities on Mortality in Patients with Chronic Obstructive Pulmonary Disease: a Register-based, Prospective Cohort Study”, FMEP, no. 6, pp. 74–78, Dec. 2018.