@article{700860,
     title = {The simple dimension of a topological space},
     booktitle = {General Topology and its Relations to Modern Analysis and Algebra},
     series = {GDML\_Books},
     publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1967},
     pages = {341-346},
     mrnumber = {MR0242134},
     zbl = {0159.52801},
     url = {http://dml.mathdoc.fr/item/700860}
}

Sobczyk, A. The simple dimension of a topological space, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1967), pp. 341-346. http://gdmltest.u-ga.fr/item/700860/