A computational proof of complexity of some restricted counting problems

@article{Cai2011ACP,
  title={A computational proof of complexity of some restricted counting problems},
  author={Jin-Yi Cai and Pinyan Lu and Mingji Xia},
  journal={Theor. Comput. Sci.},
  year={2011},
  volume={412},
  pages={2468-2485}
}