@article{CRMATH_2005__340_8_615_0,
     author = {Karim Benhenni and Yingcai Su},
     title = {Stepwise sampling procedure for estimating random averages},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {615--618},
     publisher = {Elsevier},
     volume = {340},
     number = {8},
     year = {2005},
     doi = {10.1016/j.crma.2005.03.003},
     language = {en},
}