A. Heng

Case report: calcified stones in right-sided colonic diverticula stimulating gallstones.

V. Chong, A. Heng, 1995, Clinical radiology.

Early gastric cancer in Singapore.

M. Chellappa, C. Low, I. Sng, 1983, Annals of the Academy of Medicine, Singapore.

Case Report: Calcified Stones in Simulating Gallstones

V. Chong, A. Heng, C. Radiology, 1995 .

Cholangiocarcinoma complicating ulcerative colitis.

V. Chong, A. Heng, 1993, Annals of the Academy of Medicine, Singapore.