@article{NCD_2011_18_1_a0,
     author = {Milena Dobreva and Pierluigi Feliciati},
     title = {User-centric {Evaluation} of {Digital} {Libraries:} {Three} {Case} {Studies}},
     journal = {Review of the National Center for Digitization},
     pages = {1 - 14},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/NCD_2011_18_1_a0/}
}