@article{700665,
     title = {Topologies on systems of subsets},
     booktitle = {General topology and its relations to modern analysis and algebra IV},
     series = {GDML\_Books},
     publisher = {Society of Czechoslovak Mathematicians and Physicist},
     address = {Praha},
     year = {1977},
     pages = {[420]-424},
     mrnumber = {MR0474176},
     zbl = {0363.54002},
     url = {http://dml.mathdoc.fr/item/700665}
}

Sekanina, Milan. Topologies on systems of subsets, dans General topology and its relations to modern analysis and algebra IV, GDML_Books,  (1977), pp. [420]-424. http://gdmltest.u-ga.fr/item/700665/