@article{CammarotoDiBella2007PEMS,
  author  = {Filippo Cammaroto and Beatrice Di Bella},
  title   = {On a Separation Theorem Involving the Quasi-Relative Interior},
  journal = {Proceedings of the Edinburgh Mathematical Society},
  volume  = {50},
  number  = {3},
  pages   = {605--610},
  year    = {2007},
  doi     = {10.1017/S0013091505000994}
}