@InProceedings{Matkowski:1989,
  author      = "J. Matkowski",
  title       = "On an iteration group and its application to a proof of the converse of Minkowski's inequality theorem",
  booktitle   = "European Conference on Iteration Theory",
  address     = "Batschuns, Austria",
  publisher   = "River Edge, World Scientific Publishing",
  pages       = "215--223",
  year        = "1989",
}