@article{CRMATH_2009__347_1-2_93_0,
     author = {Bertrand, Fr\'ed\'eric},
     title = {$ \mathcal{G}$-invariance faible et isovariance en planification exp\'erimentale},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {93--98},
     publisher = {Elsevier},
     volume = {347},
     number = {1-2},
     year = {2009},
     doi = {10.1016/j.crma.2008.09.027},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2008.09.027/}
}