Malik, S. M., S. K. Bhasin, and T. P. Azad. “Outcome of Ultrasound Guided Pigtail Catheter Drainage of Liver Abscesses a Prospective Study of 126 Cases”. International Surgery Journal, vol. 2, no. 4, Dec. 2016, pp. 634-40, doi:10.18203/2349-2902.isj20151093.