1. Burdina EG, Novozhenova EV, Vasilchenko SA, Meshcheryakov AI i dr. Biliary sludge: diagnosis, evaluation criteria, forecast. Kremlin medicine. Clinical Herald. 2014;3:103-109. (In Russ.)
2. Tonkikh YuL, Bronnikova EP. Holelitiaz: the current state of the problem. TRANS-Baikal medical Bulletin. 2014:2:144-148. (In Russ.)
3. Barreras González JE, Torres Peña R, Ruiz Torres J, Martínez Alfonso MÁ, Brizuela Quintanilla R, Morera Pérez M. Endoscopic versus laparoscopic treatment for choledocholithiasis: a prospective randomized controlled tria. Endosc Int Open. 2016;4(11):1188-1193.
4. Aliyev YuG. mini-Invasive interventions in surgical treatment of complicated gallstone disease. Surgery. 2013;5:73-75. (In Russ.)
5. Khvorostov ED, Bychkov SA, Grinev RN. Staged minimally invasive treatment of cholelithiasis complicated by choledocholithiasis. Kharkov Surgical School. 2013;1:119-121. (In Russ.)