@article{10_4064_fm_153_1_41_58,
     author = {Just Winfried and Marion Sheepers and Juris Steprans and Paul Szeptycki},
     title = {G\ensuremath{\delta} -sets in topological spaces and games},
     journal = {Fundamenta Mathematicae},
     pages = {41--58},
     publisher = {mathdoc},
     volume = {153},
     number = {1},
     year = {1997},
     doi = {10.4064/fm-153-1-41-58},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-153-1-41-58/}
}