@article{
  author = {},
  title = {Efficient synthesis of tetrahydrobenzo[b]pyran derivatives catalyzed by poly(4-vinylpyridine) as a green and heterogeneous recyclable basic catalyst under solvent-free condtions},
  journal = {Iranian Journal of Organic Chemistry},
  year = {2013},
  volume = {5},
  number = {3},
  pages = {0-0},
  doi = {}
}