@article{
  author = {Danaei, Abolfazi},
  title = {Providing a model for superior value proposition with emphasis on developing a unique marketing strategy for the company using of Grounded theory },
  journal = {Modiriat-e- farda},
  year = {2020},
  volume = {18},
  number = {60},
  pages = {175-194},
  doi = {}
}