@article{IJAMCS_2011_21_2_a2,
     author = {Ko{\l}odziej, J. and Xhafa, F.},
     title = {Modern approaches to modeling user requirements on resource and task allocation in hierarchical computational grids},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {243--257},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2011_21_2_a2/}
}