@article{10_4064_fm_82_1_11_24,
     author = {Petr H\'ajek},
     title = {Degrees of dependence in the theory of semisets.},
     journal = {Fundamenta Mathematicae},
     pages = {11--24},
     publisher = {mathdoc},
     volume = {82},
     number = {1},
     year = {1974},
     doi = {10.4064/fm-82-1-11-24},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-82-1-11-24/}
}