@article{700920,
     title = {Collared sets},
     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 = {[270]-271},
     mrnumber = {MR0146786},
     zbl = {0114.14104},
     url = {http://dml.mathdoc.fr/item/700920}
}

Michael, E. Collared sets, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1962), pp. [270]-271. http://gdmltest.u-ga.fr/item/700920/