@article{article94051eed,
title   = {Statistical analysis of proficiency testing results under elliptical distributions},
author = {Pinto Júnior, Dorival Leão and Aoki, Reiko and Silva, G. F.},
year = {2009},
doi = {10.1016/j.csda.2008.12.003},
journal   = {Computational Statistics and Data Analysis}
}