@techreport{SchJeuSwi2002-30,
  author     = {Schrage, M. and Jeuring, J.T. and Swierstra, S.D.},
  title      = {Combinators for layered software architectures},
  insitution = {Department of Computer Science, Utrecht University},
  year       = {2002},
  type       = {UU-CS},
  number     = {2002-30},
  url        = {http://www.cs.uu.nl/pub/RUU/CS/techreps/CS-2002/2002-030.pdf},
}