@article{10_21136_CMJ_1972_101124,
     author = {Bican, Ladislav},
     title = {Notes on purities},
     journal = {Czechoslovak Mathematical Journal},
     pages = {525--534},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {1972},
     doi = {10.21136/CMJ.1972.101124},
     mrnumber = {0347899},
     zbl = {0245.16020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1972.101124/}
}