@article{bwmeta1.element.bwnjournal-article-smv32i1p20bwm, author = {A. Pe\l czy\'nski}, title = {Universal bases}, journal = {Studia Mathematica}, volume = {32}, year = {1969}, pages = {247-268}, zbl = {0185.37401}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv32i1p20bwm} }
Pełczyński, A. Universal bases. Studia Mathematica, Tome 32 (1969) pp. 247-268. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv32i1p20bwm/