H. Y. Al-Najjar, A. Z. Omran, and Z. A. Al- Najjar, “Coronary Artery Spasm; Frequency and Angiographic Findings in the Iraqi center for heart diseases (Single Centre experience)”, JFacMedBagdad, vol. 58, no. 4, pp. 337–341, Jan. 2016, doi: 10.32007/jfacmedbagdad.584279.