@article{Himmel:2017,
  author  = "M. Himmel and J. Matkowski",
  title   = "Beta-type functions and the harmonic mean",
  journal = "Aequationes Mathematicae",
  volume  = "Vol. 91",
  number  = "iss. 6",
  pages   = "1041--1053",
  year    = "2017",
}