@article{IJAMCS_2001_11_3_a3,
     author = {Nicoletti, M. C. and Uchoa, J. Q. and Baptistini, M. T. Z.},
     title = {Rough {Relation} {Properties}},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {621--635},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2001_11_3_a3/}
}