@article{Hajja:2013,
  author  = "M. Hajja and P. Bullen and J. Matkowski and E. Neuman and S. Simic",
  title   = "Means and their inequalities",
  journal = "International Journal of Mathematics and Mathematical Sciences",
  volume  = "Vol. 2013",
  pages   = "1",
  year    = "2013",
  note    = "[editorial]",
}