Rashid, R., M. W. Mazumder, A. B. Karim, F. Begum, F. Islam, and Z. F. Sonia. “Von Willebrand Disease, A Rare Cause of Massive Upper GI Bleeding: A Case Report”. Bangladesh Journal of Child Health, vol. 43, no. 3, Oct. 2020, pp. 188-91, doi:10.3329/bjch.v43i3.49581.