L. Wyatt Alverson II, Robert G. Donnelly, Scott J. Lewis, Marti McClard, Robert Pervine, Robert A. Proctor, N. J. Wildberger. Distributive Lattices Defined for Representations of Rank Two Semisimple Lie Algebras. SIAM J. Discrete Math., 23(1):527-559, 2009. [doi]
Abstract is missing.