Certainly, here are the references for the studies mentioned in the discussion paragraph.1
Note
Nine articles from the Journal are indexed in Dimensions, but this article is not one of them.
References
1Nazim AQ, Kamal SMM, Sorno SK. Physical Risk Factor to Develop Musculoskeletal Disorders Among Salesmen at Shopping Center. International Journal of Medical and Pharmaceutical Research. 4(6):218-224. doi:10.5281/zenodo.10474498