General monotonicity, interpolation of operators, and applications
  We continue the work of S. Tikhonov, E. Liflyand, B. Booton, and others, proving the equivalence of L(p,q)-norms of general monotone functions and of their Fourier transforms. The main tool in this work is the interpolation properties of cones of general monotone functions in L(p,q)-norms. 
S.M. Grigoriev, Y. Sagher, T.R. Savage
math.CA