@techreport{widens2,
  author = {H. Aiache and J. M. Barcel{\'o} and C. Blondia and A. Boukalov and L. Cerd{\`a} and J. Delaigle and F. Filali and J. Garc{\'i}a and X. Gonzalez and R. Guimaraes and J. Karvo and R. Knopp and E. Lara and N. Nikaein and S. Masson and J. Meessen and S. Mekrazi and V. Meril{\"a}inen and J. Morillo and C. Parisot and A. P{\'e}rez-Neira and M. Realp and S. Romaszko and E. Santos and M. Voorhaen},
  editor = {M. Voorhaen, C. Blondia},
  title = {User Requirements and First System Architecture Design},
  institution = {FP6 Widens project},
  year = {2004},
  number = {D2.1},
  month = {May.},
}