@article{10_21136_CMJ_1990_102418,
     author = {Jakub{\'\i}k, J\'an},
     title = {On directed interpolation groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {648--658},
     year = {1990},
     volume = {40},
     number = {4},
     doi = {10.21136/CMJ.1990.102418},
     mrnumber = {1084900},
     zbl = {0757.06007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1990.102418/}
}