PaperThe existence and construction of free iterative theoriesStephen L. Bloom, Calvin C. ElgotJournal of Computer and System Sciences
PaperP-varieties - a signature independent characterization of varieties of ordered algebrasStephen L. Bloom, Jesse B. WrightJournal of Pure and Applied Algebra
PaperOn the algebraic structure of rooted treesCalvin C. Elgot, Stephen L. Bloom, et al.Journal of Computer and System Sciences