@article{KYB_1998__34_4_a7,
     author = {Duin, Robert P. W. and de Ridder, Dick and Tax, David M. J.},
     title = {Featureless pattern classification},
     journal = {Kybernetika},
     pages = {[399]},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1998},
     zbl = {1274.68381},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1998__34_4_a7/}
}