Kar, N., M. Ullah, P. Karmakar, A. M. Islam, A. Reza, and S. Rahman. “Percutaneous Coronary Intervention in Chronic Total Occlusion - In Hospital Outcome”. Cardiovascular Journal, vol. 1, no. 2, Aug. 2011, pp. 156-60, doi:10.3329/cardio.v1i2.8122.