@book{402488, title = {Point Sets}, series = {GDML\_Books}, publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences}, address = {Praha}, year = {1969}, mrnumber = {MR0256344}, zbl = {0191.53203}, language = {en}, url = {http://dml.mathdoc.fr/item/402488} }
Čech, Eduard; Katětov, M. Point Sets. GDML_Books (1969), http://gdmltest.u-ga.fr/item/402488/