@article{JAC_1996__5_1_a1,
     author = {Song, Sung Y.},
     title = {Commutative association schemes whose symmetrizations have two classes},
     journal = {Journal of Algebraic Combinatorics},
     pages = {47--55},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_1996__5_1_a1/}
}