@article{10_21136_CMJ_1989_102336,
     author = {Jakub{\'\i}k, J\'an},
     title = {Direct product decompositions of directed groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {618--621},
     publisher = {mathdoc},
     volume = {39},
     number = {4},
     year = {1989},
     doi = {10.21136/CMJ.1989.102336},
     mrnumber = {1017995},
     zbl = {0713.06007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102336/}
}