Continued fractions and density results for Dedekind sums. Dean Hickerson — 1977 Journal für die reine und angewandte Mathematik
Counting horizontally convex polyominoes. Hickerson, Dean — 1999 Journal of Integer Sequences [electronic only]
Reducing a set by subtracting squares. Hickerson, Dean; Kleber, Michael — 1999 Journal of Integer Sequences [electronic only]