@Article{	  soille2002pr,
  author	= {Soille, P.},
  title		= {On morphological operators based on rank filters},
  journal	= {Pattern Recognition},
  year		= {2002},
  volume	= {35},
  number	= {2},
  pages		= {527-535},
  doi		= {10.1016/S0031-3203(01)00047-4},
  month		= feb
}