Ucar Karabulut, K., and B. Cander. “N Terminal Prohormone Brain Natriuretic Peptit Level in Patients With Arhythmia”. Annals of Medical Research, vol. 23, no. 2, May 2021, pp. 0138-41, http://www.annalsmedres.org/index.php/aomr/article/view/2267.