@article{PS_2005__9__1_0,
     author = {Laurent, B\'eatrice},
     title = {Adaptive estimation of a quadratic functional of a density by model selection},
     journal = {ESAIM: Probability and Statistics},
     pages = {1--18},
     publisher = {EDP-Sciences},
     volume = {9},
     year = {2005},
     doi = {10.1051/ps:2005001},
     mrnumber = {2148958},
     zbl = {1136.62333},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ps:2005001/}
}