Yang, Pai et Nevo, Shahar, Derivatives of meromorphic functions with multiple zeros and elliptic functions, Acta mathematica Sinica. English series (Print) , 29(7), 2013, pp. 1257-1278
Let f be a nonconstant meromorphic function in the plane and h be a nonconstant elliptic function. We show that if all zeros of f are multiple except finitely many and T(r, h) = o{T(r, f)} as r.., then f. = h has infinitely many solutions (including poles).