@article{10_4064_fm228_1_2,
     author = {Janusz Pawlikowski},
     title = {Selivanovski hard sets are hard},
     journal = {Fundamenta Mathematicae},
     pages = {17--25},
     publisher = {mathdoc},
     volume = {228},
     number = {1},
     year = {2015},
     doi = {10.4064/fm228-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm228-1-2/}
}