Chawla, Y KDilawari, J B1995-01-012009-06-041995-01-012009-06-041995-01-01Chawla YK, Dilawari JB. Biliary sludge. Tropical Gastroenterology. 1995 Jan-Mar; 16(1): 14-7http://imsear.searo.who.int/handle/123456789/12457431 references.engBileGallbladder Diseases --etiologyHumansJournal Article