Begum, L. N., K. Azad, S. Akhter, N. Nahar, and A. H. M. Abdullah. “Assessment of Perinatal Mortality in a Tertiary Care Hospital by Using Wigglesworth Classification”. Bangladesh Journal of Child Health, vol. 31, no. 1, Sept. 2010, pp. 32-39, doi:10.3329/bjch.v31i1.6072.