Shahid, F., Khan, R. A., Anwar, S. and Wajidi, F. A. (2026) “The Impact of Lead-Time Variability on Supply Chain Operations of Retail Stores and Supermarkets in Karachi During the Pandemic Situation”, Siazga Research Journal, 5(1), pp. 30–42. doi: 10.5281/zenodo.20028813.