@article{10_4064_fm226_3_1,
     author = {V\'aclav Vlas\'ak},
     title = {The sizes of the classes of $H^{(N)}$-sets},
     journal = {Fundamenta Mathematicae},
     pages = {201--220},
     publisher = {mathdoc},
     volume = {226},
     number = {3},
     year = {2014},
     doi = {10.4064/fm226-3-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm226-3-1/}
}