@article{IJAMCS_2002_12_3_a3,
     author = {Pedrycz, W. and Vukovich, G.},
     title = {Relations of granular worlds},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {347--357},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2002_12_3_a3/}
}