@article{CC_2010_39_2_a9,
     author = {Grzymala-Busse, Jerzy W. and Grzymala-Busse, Witold J. and Hippe, Zdzis{\l}aw S. and Rz\k{a}sa, Wojciech},
     title = {An improved comparison of three rough set approaches to missing attribute values},
     journal = {Control and Cybernetics},
     pages = {469--486},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2010_39_2_a9/}
}