  In this paper, we present a method to identify integrable complex nonlinear
oscillator systems and construct their solutions. For this purpose, we
introduce two types of nonlocal transformations which relate specific classes
of nonlinear complex ordinary differential equations (ODEs) with complex linear
ODEs, thereby proving the integrability of the former. We also show how to
construct the solutions using the two types of nonlocal transformations with
several physically interesting cases as examples.
