@article{10_4153_CMB_2013_029_9,
     author = {Grari, A.},
     title = {Un anneau commutatif associ\'e \`a un design sym\'etrique},
     journal = {Canadian mathematical bulletin},
     pages = {72--79},
     year = {2014},
     volume = {57},
     number = {1},
     doi = {10.4153/CMB-2013-029-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2013-029-9/}
}