Space Bounds for Processing Contentless Inputs. - Allen R. Freedman; Richard E. Ladner (J. Comput. Syst. Sci., 1975)

Small sets which meet all the k(n)-term arithmetic progressions in the interval [1, n]. - Tom C. Brown; Allen R. Freedman (J. Comb. Theory A, 1989)

Quasi-progressions and descending waves. - Tom C. Brown; Paul Erdös; Allen R. Freedman (J. Comb. Theory A, 1990)

Semi-Progressions. - P. Ding; Allen R. Freedman (J. Comb. Theory A, 1996)

Progressions of squares. - Tom C. Brown; Allen R. Freedman; Peter Jau-Shyong Shiue (Australas. J Comb., 2003)

Sequences on Sets of Four Numbers. - Allen R. Freedman; Tom C. Brown (Integers, 2016)