Geoffrey Exoo Alan C. H. Ling John P. McSorley Nicholas C. K. Phillips Walter D. Wallis Totally magic graphs. 103-113 2002 254 Discrete Mathematics 1-3 http://dx.doi.org/10.1016/S0012-365X(01)00367-3 db/journals/dm/dm254.html#ExooLMPW02