Further properties of the Bergman spaces of slice regular functions
  In this paper we continue the study of Bergman theory for the class of slice regular functions.   In the slice regular setting there are two possibilities to introduce the Bergman spaces, that are called of the first and of the second kind. In this paper we mainly consider the Bergman theory of the second kind, by providing an explicit description of the Bergman kernel in the case of the unit ball and of the half space. In the case of the unit ball, we study the Bergman-Sce transform. We also show that the two Bergman theories can be compared only if suitable weights are taken into account. Finally, we use the Schwarz reflection principle to relate the Bergman kernel with its values on a complex half plane. 
Fabrizio Colombo, J. Oscar Gonzalez-Cervantes, Irene Sabadini
math.CV