Notes on the Ramsey Number N(3, 3, 3, 3). - Jon Folkman (J. Comb. Theory A, 1974)

Oriented matroids. - Jon Folkman; Jim Lawrence (J. Comb. Theory B, 1978)

Sum sequences modulo n. - Fan Chung; Jon Folkman; Ron Graham 001 (J. Comb. Theory A, 2018)