@article{700902,
     title = {Mappings of proximity structures},
     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 = {1962},
     pages = {139-141},
     mrnumber = {MR0146792},
     zbl = {0114.14101},
     url = {http://dml.mathdoc.fr/item/700902}
}

Dowker, C. H. Mappings of proximity structures, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1962), pp. 139-141. http://gdmltest.u-ga.fr/item/700902/