%0 Journal Article %A Dermot McCarthy %A Chris Monico %T A Mathon-type construction for digraphs and improved lower bounds for Ramsey numbers %J The electronic journal of combinatorics %D 2025 %V 32 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/13294/ %R 10.37236/13294 %F 10_37236_13294