@article{Krassowska:2005,
  author  = "D. Krassowska and J. Matkowski",
  title   = "A pair of linear functional inequalities and a characterization of Lp - norm",
  journal = "Annales Polonici Mathematici",
  volume  = "Vol. 85",
  number  = "no 1",
  pages   = "1--11",
  year    = "2005",
}