@article{urn:eudml:doc:42447, title = {A class of PPS estimators variance using auxihary information.}, journal = {Revista de la Real Academia de Ciencias Exactas F\'\i sicas y Naturales}, volume = {93}, year = {1999}, pages = {217-220}, zbl = {0952.62014}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:42447} }
HousiLA P. SINGH AND M. RUIZ ESPEJO. A class of PPS estimators variance using auxihary information.. Revista de la Real Academia de Ciencias Exactas Físicas y Naturales, Tome 93 (1999) pp. 217-220. http://gdmltest.u-ga.fr/item/urn:eudml:doc:42447/