@article{art5989,
  title = {Enhancing Product UpgradaProduct Modular Enhancement Framework (PMEF): A New Approach to Product Upgradationtion: A Study on theModular Enhancement Framework (MEF)},
  doi = {10.18535/ijsrm/v13i01.em11},
  url = {https://ijsrm.net/index.php/ijecs/article/view/5989}
}