Praderi Gambardella, L. A.; Geninazzi, H.; Tchekmedyian, V.; Balboa, O.; Matteucci, P.; Voelker, R.; Praderi, L. A. Examination and Treatment of Lithiasis of the Main Bile Duct in Laparoscopic Surgery. Cir. Urug. 1995, 65, 153-158.