@TechReport{JVV2001b,
  author = "de Jonge, M. and E. Visser and J. Visser",
  title  = {Collaborative Software Development},
  year   = 2001,
  institution = {CWI},
  number      = {SEN-R0113},
  note        = {available at ftp://ftp.cwi.nl/pub/CWIreports/SEN/SEN-R0113.ps.Z}
}