Compact intertwining relations for composition operators on $H^\infty$   and the Bloch spaces
  On the space of bounded analytic functions and the Bloch space on the unit disk, we study the compact intertwining relations for composition operators, whose intertwining operators are Volterra type operators. Further, we consider the compact intertwining relations, which are between the whole collection of composition operators and some Volterra operator, and the whole collection of bounded Volterra operators and some composition operator. 
Ce-Zhong Tong, Cheng Yuan and Ze-Hua Zhou
math.FA math.CV