@InProceedings{SEGrigorescuPetkovKruizingaICPR2000,
  author =    {S.E. Grigorescu, N. Petkov and P. Kruizinga},
  title =     {A comparative study of filter based texture operators using Mahalanobis distance},
  booktitle = {Proceedings of the 15th Int. Conf. on Pattern Recognition, ICPR 2000},
  year =      {2000},
  volume =    {3},
  pages =     {897-900},
  publisher = {IEEE Press}.
}