@Article{rychlik-00,
  author =	 {Marek Rychlik and Weiye Li},
  title =	 {On the stability of oligopolies},
  journal =	 {Nonlinear Analysis},
  year =	 2000,
  volume =	 7,
  number =	 2,
  pages =	 {11--35},
  month =	 {June}
}