@Article{ 
  AlBoCoSa15,
  author = { Alpay, Daniel and Bolotnikov, Vladimir and Colombo, Fabrizio and Sabadini, Irene },
  title = { Self-mappings of the quaternionic unit ball: multiplier properties, the Schwarz-Pick inequality, and the Nevanlinna-Pick interpolation problem },
  journal = { Indiana Univ. Math. J. },
  year = { 2015 },
  doi = { 10.1512/iumj.2015.64.5456 },
  volume = { 64 },
  number = { 1 },
  pages = { 151-180 },
  URL = { https://gecogedi.dimai.unifi.it/paper/135/ },
  note = { cvgmt preprint}
}