@article{10_4064_cm_26_1_183_192,
     author = {E. T. Davies},
     title = {Extremal subspaces in an areal space},
     journal = {Colloquium Mathematicum},
     pages = {183--192},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1972},
     doi = {10.4064/cm-26-1-183-192},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-26-1-183-192/}
}