@article{ELMA_1972__27_141039,
     author = {B\'ela Bollob\'as},
     title = {Functionals {Close} to {Each} {Other.}},
     journal = {Elemente der Mathematik},
     pages = {9--10},
     publisher = {mathdoc},
     volume = {27},
     year = {1972},
     zbl = {0227.46025},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1972__27_141039/}
}