@article {van2012subset, title = {Subset selection{\textendash}extended Rizvi{\textendash}Sobel for unequal sample sizes and its implementation}, journal = {Journal of Nonparametric Statistics}, volume = {24}, number = {2}, year = {2012}, pages = {299{\textendash}315}, publisher = {Taylor and Francis}, author = {van Eeden, Constance and Zidek, James V} }