@article{1177703598, author = {Raj, Des}, title = {On Double Sampling for PPS Estimation}, journal = {Ann. Math. Statist.}, volume = {35}, number = {4}, year = {1964}, pages = { 900-902}, language = {en}, url = {http://dml.mathdoc.fr/item/1177703598} }
Raj, Des. On Double Sampling for PPS Estimation. Ann. Math. Statist., Tome 35 (1964) no. 4, pp. 900-902. http://gdmltest.u-ga.fr/item/1177703598/