@article{
  author = {nezamivand chegini, hooshang},
  title = {Portfolio strategies in industrial marketing   With the product life cycle approach},
  journal = {Modiriat-e- farda},
  year = {2019},
  volume = {18},
  issue = {60},
  pages = {33-46},
  doi = {},
  url = {https://rimag.ir/fa/Article/25902}
}