Alain Bretto Cerasela Jaulin Kevin G. Kirby Bernard Laget G-Graphs and Algebraic Hypergraphs. 153-158 2008 30 Electronic Notes in Discrete Mathematics http://dx.doi.org/10.1016/j.endm.2008.01.027 db/journals/endm/endm30.html#BrettoJKL08