@TechReport{birkedal05bigraphical,
  author = 	 {Lars Birkedal and S\o{}ren Debois and Ebbe Elsborg and Thomas Hildebrandt and Henning Niss},
  title = 	 {Bigraphical {M}odels of {C}ontext-aware {S}ystems},
  institution =  {IT University of Copenhagen},
  year = 	 {2005},
  number = 	 {74},
  month = 	 {November},
  note = 	 {ISBN: 87-7949-110-3}
}