@article{10_21136_CMJ_1968_100829,
     author = {Byrd, Richard D.},
     title = {$M$-polars in lattice-ordered groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {230--239},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1968},
     doi = {10.21136/CMJ.1968.100829},
     mrnumber = {0227066},
     zbl = {0174.06004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1968.100829/}
}