@inproceedings{AM09,
  author        = {B. Alcalde and S. Mauw},
  title         = {An algebra for trust dilution and trust fusion},
  booktitle     = {Proc.\ 6th Workshop on Formal Aspects in Security and Trust},
  publisher     = {Springer-Verlag},
  series        = {LNCS},
  editor        = {Pierpaolo Degano and Joshua Guttman},
  month         = {November 5-6},
  year          = {2009},
  location      = {Eindhoven, The Netherlands},
  volume        = {5983},
  pages         = {4--20}
}