Akhmedov, V.A., et al. “The Participation of Matrix Metalloproteinases-9 and TIMP-1 in Formation of Atrial Fibrillation Paroxisms in Patients With Metabolic Syndrome”. Patologicheskaya Fiziologiya I Eksperimental’naya Terapiya (Pathological physiology and experimental Therapy), vol. 57, no. 4, Nov. 2013, pp. 46–50, https://pfiet.ru/article/view/4666.