S. Avann: Ternary distributive semilattices. Bull. AMS 54 (1948), 79.

S. Avann: Metric ternary distributive semilattices. Proc. AMS 12 (1961), 407-414.

16601 Hans-Jürgen Bandelt: Endomorphism semigroups of median algebras.
Algebra Univ. 12 (1981), 262-264.

16558 Hans-Jürgen Bandelt/Victor Chepoi: A Helly theorem in weakly modular space.
Discrete Math. 160 (1996), 25-39.

16600 Hans-Jürgen Bandelt/Jarmila Hedlikova: Median algebras.
Discrete Math. 45 (1983), 1-30.

16602 Hans-Jürgen Bandelt/Gerasimos Meletiou: The zero-completion of a median algebra.
Czech. Math. J. 43 (1989), 409-417.

16605 Hans-Jürgen Bandelt/Marcel van de Vel: Embedding topological median algebras
in products of dendrons. Proc. London MS 58/3 (1989), 439-453.

16561 Hans-Jürgen Bandelt/Marcel van de Vel: The median stabilization degree of a
median algebra. J. Algebraic Combinatorics 9 (1999), 115-127.

G. Birkhoff/S. Kiss: A ternary operation in distributive lattices.
Bull. AMS 53 (1947), 749-752.

Victor Chepoi: A multifacility location problem on median spaces.
Discrete Appl. Math. 64/1 (1996), 1-29.

J. Cibulskis: A characterization of the lattice orderings on a set which induce
a given betweenness. J. London Math. Soc. 1 (1969), 480-482.

W. Duthie: Segments of ordered sets. Trans. AMS 51 (1942), 1-14.

16606 John Isbell: Median algebra. Trans. AMS 260 (1980), 319-362.

M. Kolibiar/T. Marcisova: On a question of J. Hashimoto. Mat. Casopis 24 (1974), 179-185.

H. Mulder: The structure of median graphs. Discrete Math. 24 (1978), 197-204.

H. Mulder/A. Schrijver: Median graphs and Helly hypergraphs.
Discrete Math. 25 (1979), 41-50.

L. Nebesky: Median graphs. Comm. Math. Univ. Carolinae 12 (1971), 317-325.

J. Nieminen: Join-semilattices and simple graphic algebras. Math. Nachr. 77 (1977), 87-91.

J. Nieminen: The ideal structure of simple ternary algebras.
Manu. Math. 21 (1977), 51-57.

16604 Marlow Sholander: Trees, lattices, order, and betweenness.
Proc. AMS 3 (1952), 369-381.

16623 Marlow Sholander: Medians and betweenness. Proc. AMS 5 (1954), 801-807.

16603 Marlow Sholander: Medians, lattices, and trees. Proc. AMS 5 (1954), 808-812.

Marcel van de Vel: Binary convexities and distributive lattices.
Proc. London Math. Soc. 48 (1984), 1-33.

16557 Marcel van de Vel: Collapsible polyhedra and median spaces.
Proc. AMS 126/9 (1998), 2811-2818.

16562 Marcel van de Vel: Determination of msd(L^n).
J. Algebraic Combinatorics 9 (1999), 162-171.

16690 E. Verheul: Multimedians in metric and normed spaces. CWI 1993, 140p. Eur 18.