@article{10_21136_CMJ_1990_102362,
     author = {Jakub{\'\i}k, J\'an},
     title = {Retract varieties of lattice ordered groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {104--112},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {1990},
     doi = {10.21136/CMJ.1990.102362},
     mrnumber = {1032363},
     zbl = {0705.06011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1990.102362/}
}