@article{AL_2003_42_4_a4,
     author = {A. M. Protopopov},
     title = {Convex {Subgroups} of {Partially} {Right-Ordered} {Groups}},
     journal = {Algebra i logika},
     pages = {497--509},
     publisher = {mathdoc},
     volume = {42},
     number = {4},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2003_42_4_a4/}
}