[1] BIRKHOFF G.: Lattice theory. 3rd ed., AMS Colloquium Publications, Providence, 1967. MR 0227053 | Zbl 0153.02501

[2] DILWORTH R. P. M. WARD: Residuated lattices. Transl. Amer. Math. Soc. 45 (1939), 335-354. MR 1501995

[3] EILENBERG S. G. M. KELLY: Closed categories. in Proceedings of the Conference on Categorical Algebra, La Jolla 1965, Springer-Verlag 1966, pp. 421-562. MR 0225841

[4] MENU J. J. PAVELKA: A note on tensor products on the unit interval. Comment. Math. Univ. Carolinae 17 (1976), 71-83. MR 0404094

[5] MOSTERT P. S. A. L. SHIELDS: On the structure of semigroups on a compact manifold with boundary. Annals of Math. 65 (1957), 117-143. MR 0084103