@article{Matkowski:2010,
  author  = "J. Matkowski",
  title   = "Generalizations of Lagrange and Cauchy mean-value theorems",
  journal = "Demonstratio Mathematica",
  volume  = "Vol. 43",
  number  = "no 4",
  pages   = "765--774",
  year    = "2010",
}