@article{CMUC_1966__7_1_a3,
     author = {John, Kamil and Dost\'al, Milo\v{s}},
     title = {Completion of certain $\Lambda$-structures},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {93--103},
     publisher = {mathdoc},
     volume = {07},
     number = {1},
     year = {1966},
     mrnumber = {0198186},
     zbl = {0195.40702},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1966__7_1_a3/}
}