@article{ARM_1971_7_4_a0,
     author = {Barv{\'\i}nek, Erich},
     title = {Fundamental central dispersions in a double system $\langle\langle\frak G\rangle\rangle$},
     journal = {Archivum mathematicum},
     pages = {145--152},
     year = {1971},
     volume = {7},
     number = {4},
     mrnumber = {0315223},
     zbl = {0243.34116},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1971_7_4_a0/}
}