@article{701835,
     title = {Always of the first category sets},
     booktitle = {Proceedings of the 12th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1984},
     pages = {[139]-147},
     mrnumber = {MR0782712},
     zbl = {0571.54025},
     url = {http://dml.mathdoc.fr/item/701835}
}

Grzegorek, E. Always of the first category sets, dans Proceedings of the 12th Winter School on Abstract Analysis, GDML_Books,  (1984), pp. [139]-147. http://gdmltest.u-ga.fr/item/701835/