@article{Jarczyk:1994,
  author  = "W. Jarczyk and K. Łoskot and M. Zdun",
  title   = "Commuting functions and simultaneous Abel equations",
  journal = "Annales Polonici Mathematici",
  volume  = "Vol. 60",
  number  = "no 2",
  pages   = "119--135",
  year    = "1994",
}