Frank Fiedler Ka Hin Leung Qing Xiang On Mathon's construction of maximal arcs in Desarguesian planes II. 99-122 2004 108 J. Comb. Theory, Ser. A 1 http://dx.doi.org/10.1016/j.jcta.2004.06.005 db/journals/jct/jcta108.html#FiedlerLX04