@article{700853,
     title = {\"Uber die Realisierung von Boole-Algebren als Boole-Algebren regul\"ar offener Mengen},
     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 = {133-139},
     mrnumber = {MR0241337},
     zbl = {0169.24901},
     url = {http://dml.mathdoc.fr/item/700853}
}

Flachsmeyer, J. Über die Realisierung von Boole-Algebren als Boole-Algebren regulär offener Mengen, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1967), pp. 133-139. http://gdmltest.u-ga.fr/item/700853/