F. Erwan, P. D. Sentia, Z. Fadhilla, D. Asmadi, R. D. Lufika, and R. A. Syahputra, “Supply Chain Risk Management Design for U-Hansa Product in Relation to Covid-19 Pandemics”, OE, vol. 14, no. 2, pp. 200–210, Sep. 2022.