Hashem, S, M Hossain, MA Ali, AK Choudhury, and AA Masum. 2012. “Radiofrequency Catheter Ablation of Left Free Wall Accessory Pathways: Comparison Between Retrograde and Transeptal Approach”. Cardiovascular Journal 4 (2):139-47. https://doi.org/10.3329/cardio.v4i2.10458.