@article{MAN_1969__182_161849,
     author = {G. CROFTS},
     title = {Concerning {Perfect} {Fr\'echet} {Spaces} and {Diagonal} {Transformations.}},
     journal = {Mathematische Annalen},
     pages = {67--76},
     publisher = {mathdoc},
     volume = {182},
     year = {1969},
     zbl = {0165.46902},
     url = {http://geodesic.mathdoc.fr/item/MAN_1969__182_161849/}
}