@article{10_21136_CMJ_1991_102477,
     author = {Jakub{\'\i}k, J\'an},
     title = {Mixed product decompositions of a directed group},
     journal = {Czechoslovak Mathematical Journal},
     pages = {429--435},
     publisher = {mathdoc},
     volume = {41},
     number = {3},
     year = {1991},
     doi = {10.21136/CMJ.1991.102477},
     mrnumber = {1117796},
     zbl = {0756.06010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102477/}
}