Ramanujan grammar and Cayley trees. (Grammaire de Ramanujan et arbres de Cayley.) Dumont, Dominique, Ramamonjisoa, Armand (1996) The Electronic Journal of Combinatorics [electronic only]
Reciprocal domains and Cohen-Macaulay d -complexes in ℝ d . Miller, Ezra, Reiner, Victor (2005) The Electronic Journal of Combinatorics [electronic only]