@article{Bojarski:2011,
  author  = "J. Bojarski and T. Małolepszy and J. Matkowski",
  title   = "A differential equation related to the 1p-norms",
  journal = "Annales Polonici Mathematici",
  volume  = "Vol. 101",
  number  = "no 3",
  pages   = "251--265",
  year    = "2011",
}