@article{INTA_1981_19_a0,
     author = {V. M. Kopytov},
     title = {Ordered groups},
     journal = {Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya },
     pages = {3--29},
     publisher = {mathdoc},
     volume = {19},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTA_1981_19_a0/}
}