Monomials of Entire Algebroid Functions

Hayman has shown that if f is a transcendental entire function and nG2, then f n f 9 assumes all values except possibly zero infinitely often. We extend his result in three directions by considering an entire algebroid function w, its monomial wn0 w9.n1 ??? w k..nk, and by estimating the growth of the number of a-points of the monomial