@article{Kahlig:2014,
  author  = "P. Kahlig and J. Matkowski",
  title   = "Note on some infinite products for \pi",
  journal = "Journal of Applied Mathematics and Computational Mechanics",
  volume  = "Vol. 13",
  number  = "no. 2",
  pages   = "43--50",
  year    = "2014",
}