Investigation of Proportional Link Linkage Clustering Methods
W. Day, H. Edelsbrunner, Journal of Classification 2 (1985) 239–254.
LibreCat: https://research-explorer.ista.ac.at/record/4114
DOI: 10.1007/BF01908077

Efficient algorithms for agglomerative hierarchical clustering methods
W. Day, H. Edelsbrunner, Journal of Classification 1 (1984) 7–24.
LibreCat: https://research-explorer.ista.ac.at/record/4121
DOI: 10.1007/BF01890115