%0 Journal Article %A Stephen J. Graves %T A Tribute to Mark E. Watkins on the Occasion of his 80th Birthday %J Ars Mathematica Contemporanea %D 2017 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AMC_2017__13_2_a17/ %G en %F AMC_2017__13_2_a17