Tommaso Federici An Integrated Approach in Healthcare e-Procurement: The Case-Study of the ASL of Viterbo. 298-309 http://dx.doi.org/10.1007/978-3-540-32257-3_28 2005 conf/tcgov/2005 TCGOV db/conf/tcgov/tcgov2005.html#Federici05