We consider the class Lips of
holomorphic functions in the unit disc satisfying a Lipschitz condition of order
s,0 < s ≤ 1 and the class A1 of holomorphic functions f such that the derivatives f′
belong to the disc algebra. In this paper we give the complete characterization of the
interpolation sets for these classes, thus completing the previous works of J. Bruna,
E. M. Dyn’kin and E. P. Kronstadt.