[1] P. Conrad: Lattice Ordered Groups. Tulane University, 1970. Zbl 0258.06011

[2] P. F. Conrad, J. Harvey, Ch. Holland: The Hahn embedding theorem for lattice-ordered groups. Trans. Amer. Math. Soc. 108 (1963), 143–169. DOI 10.1090/S0002-9947-1963-0151534-0 | MR 0151534

[3] D. Dorninger, G. Eigenthaler: On compatible and order-preserving functions. Algebra and Applications, Banach Center Publications Vol. 9, Warsaw, 1982, pp. 97–104. MR 0738806

[4] L. Fuchs: Partially Ordered Algebraic Systems. Pergamon Press, Oxford, 1963. MR 0171864 | Zbl 0137.02001

[5] G. Grätzer: On Boolean functions, (Notes on lattice theory II). Revue de Math. Pures et Appliquées 7 (1962), 693–697. MR 0177922

[6] G. Grätzer: Boolean functions on distributive lattices. Acta Math. Acad. Sci. Hungar. 15 (1964), 195–201. DOI 10.1007/BF01897037 | MR 0168499

[7] H. Hahn: Über die nichtarchimedischen Grössensysteme. Sitzungsberichte K. Akad. Wiss., Math. Nat. Kl. IIa, 116, 1907, pp. 601–655.

[8] T. K. Hu: Characterization of algebraic functions in equational classes generated by independent primal algebras. Algebra Univ. 1 (1971), 187–191. MR 0296000 | Zbl 0242.08004

[9] J. Jakubík: Affine completeness of complete lattice ordered groups. Czechoslovak Math. J. 45 (1995), 571–576. MR 1344522

[10] A. F. Pixley: Functional Affine Completeness and Arithmetical Varieties. Lecture Notes, Montréal, 1991.

[11] M. Ploščica: Affine complete order of distributive lattices. Order 11 (1994), 385–390. DOI 10.1007/BF01108769 | MR 1321755

[12] D. Schweigert: Über endliche, ordnungspolynomvollständige Verbände. Monatshefte Math. 78 (1974), 68–76. DOI 10.1007/BF01298196 | MR 0340124 | Zbl 0287.06004

[13] H. Werner: Produkte von Kongruenzklassengeometrien universeller Algebren. Math. Z. 121 (1971), 111–140. DOI 10.1007/BF01113481 | MR 0281681 | Zbl 0203.22902