@article{10_4153_CMB_2010_088_8,
     author = {Spurn\'y, J. and Zelen\'y, M.},
     title = {Additive {Families} of {Low} {Borel} {Classes} and {Borel} {Measurable} {Selectors}},
     journal = {Canadian mathematical bulletin},
     pages = {180--192},
     year = {2011},
     volume = {54},
     number = {1},
     doi = {10.4153/CMB-2010-088-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2010-088-8/}
}