@article{700864,
     title = {Baire sets which are Borelian subspaces},
     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 = {140-141},
     zbl = {0169.25301},
     url = {http://dml.mathdoc.fr/item/700864}
}

Frolík, Z. Baire sets which are Borelian subspaces, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1967), pp. 140-141. http://gdmltest.u-ga.fr/item/700864/