@article{
  author = {bakhtiari, M., Mirzaei, R.},
  title = {ACTION OF SEMISIMPLE ISOMERY GROUPS ON SOME RIEMANNIAN MANIFOLDS OF NONPOSITIVE CURVATURE},
  journal = {Journal of New Researches in Mathematics},
  year = {2017},
  volume = {3},
  number = {3},
  pages = {51-58},
  doi = {}
}