@ARTICLE{Luengo2007,
  author = {Luengo Hendriks, C. L. and G. M. P. van Kempen and L. J. van Vliet},
  title = {Improving the accuracy of isotropic granulometries},
  journal = {Pattern Recognition Letters},
  year = {2007},
  volume = {28},
  pages = {865-872},
  number = {7},
  doi = {10.1016/j.patrec.2006.12.001}
}