@article{Matkowski:1993,
  author  = "J. Matkowski and K. Nikodem",
  title   = "Solutions of some functional inequalities connected with convex functions",
  journal = "Comptes Rendus Mathematiques de L'Academie des Sciences : Canada",
  volume  = "Vol. 15",
  number  = "no 2-3",
  pages   = "114--118",
  year    = "1993",
}