Glenn W. Milligan, Paul D. Isaac. The validation of four ultrametric clustering algorithms. Pattern Recognition, 12(2):41-50, 1980. [doi]
@article{MilliganI80,
title = {The validation of four ultrametric clustering algorithms},
author = {Glenn W. Milligan and Paul D. Isaac},
year = {1980},
doi = {10.1016/0031-3203(80)90001-1},
url = {http://dx.doi.org/10.1016/0031-3203(80)90001-1},
researchr = {https://researchr.org/publication/MilliganI80},
cites = {0},
citedby = {0},
journal = {Pattern Recognition},
volume = {12},
number = {2},
pages = {41-50},
}