@article{05545586,
title = {PPT designs with categorical variables for the estimation of dicho-ratios.},
journal = {Revista Colombiana de Estad\'\i stica},
volume = {28},
year = {2005},
pages = {97-112},
zbl = {1167.62351},
language = {en},
url = {http://dml.mathdoc.fr/item/05545586}
}
Fúquene P., Jairo Alberto; Bautista S.; Jaime Leonardo. PPT designs with categorical variables for the estimation of dicho-ratios.. Revista Colombiana de Estadística, Tome 28 (2005) pp. 97-112. http://gdmltest.u-ga.fr/item/05545586/