@article{Murtagh2014,
author = {Murtagh, F. and Legendre, P.},
title= {Ward’s hierarchical agglomerative clustering method: Which algorithms implement Ward’s criterion?},
year = {2014},
doi = {10.1007/s00357-014-9161-z},
volume = {31},
number = {3},
pages = {274--295},
}