%0 Journal Article %A Andrew Vince %T An extremal graph problem on a grid and an isoperimetric problem for polyominoes %J The electronic journal of combinatorics %D 2024 %V 31 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/12133/ %R 10.37236/12133 %F 10_37236_12133