Adams-Spanne type estimates for the commutators of fractional type   sublinear operators in generalized Morrey spaces on Heisenberg groups
  In this paper we give BMO (bounded mean oscillation) space estimates for commutators of fractional type sublinear operators in generalized Morrey spaces on Heisenberg groups. The boundedness conditions are also formulated in terms of Zygmund type integral inequalities. 
Ferit Gurbuz
math.FA