@article{
  author = {zargoshnasab, abdoljabar, alimohammadi, Taher, Gheybi, Masoumeh},
  title = {An Investigation of Jurisprudence Principals of Unfixed Taxes},
  journal = {Islamic Law & Jurisprudence Researches},
  year = {2017},
  volume = {11},
  number = {38},
  pages = {93-116},
  doi = {}
}