Galois closed entity sets and <i>k</i> -balls of quasi-ultrametric multi-way dissimilarities.

Jean Diatta Galois closed entity sets and <i>k</i> -balls of quasi-ultrametric multi-way dissimilarities. 53-65 2007 1 Adv. Data Analysis and Classification 1 http://dx.doi.org/10.1007/s11634-006-0005-5 db/journals/adac/adac1.html#Diatta07