@article{CammarotoDiBella2005JOTA,
  author  = {Filippo Cammaroto and Beatrice Di Bella},
  title   = {Separation Theorem Based on the Quasi-Relative Interior and Application to Duality Theory},
  journal = {Journal of Optimization Theory and Applications},
  volume  = {125},
  number  = {1},
  pages   = {223--229},
  year    = {2005},
  doi     = {10.1007/s10957-004-1724-4}
}