[1] A. M. W. Glass, W. C. Holland, S. M. McCleary: The structure of $\ell $-group varieties. Algebra Universalis 10 (1980), 1–20. DOI 10.1007/BF02482885 | MR 0552151

[2] J. Jakubík: Radical classes and radical mappings of lattice ordered groups. Sympos. Math. 31 (1977), Academic Press, NewYork-London, 451–477. MR 0491397

[3] J. Jakubík: On convexities of lattices. Czechoslovak Math. J. 42 (1992), 325–330. MR 1179503

[4] J. Jakubík: On convexities of $d$-groups. Czechoslovak Math. J. 44 (1994), 305–314. MR 1281025

[5] J. Jakubík: Convexities of lattice ordered groups. Math. Bohem. 121 (1996), 59–67. MR 1388175

[6] J. Martinez: Torsion theory of lattice ordered groups. Czechoslovak Math. J. 25 (1975), 284–299. MR 0389705

[7] R. Mlitz: General Algebra 1988. Proc. Internat. Conf. Krems 1988, North Holland, Amsterdam 1990. MR 1060340 | Zbl 0695.00007