@article{10_21136_CMJ_1987_102179,
     author = {Lon\v{c}ar, Ivan},
     title = {Relative continuity of the functor $\beta$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {517--521},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {1987},
     doi = {10.21136/CMJ.1987.102179},
     mrnumber = {913984},
     zbl = {0651.54003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1987.102179/}
}