@techreport{PennSwieVogt92-11,
  author      = {Maarten Pennings and Doaitse Swierstra and Harald Vogt},
  title       = {Using cached functions and constructors for incremental attribute evaluation},
  institution = {Department of Computer Science},
  year        = {1992},
  address     = {Padualaan 14},
  number      = {92-11},
  type        = {RUU-CS},
}