Sharma, Pallavi, Anshu Gupta, S.C. Malik, and P.C. Jha. “Quality Improvement in Manufacturing Process through Six Sigma: A Case Study of Indian MSME Firm”. Yugoslav Journal of Operations Research 29, no. 4 (November 1, 2019): 519–537. Accessed September 28, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/594.