On bifurcation points of a complex polynomial

Let f : C-n --> C be a polynomial of degree d. Assume that the set (K) over tilde (infinity)(f) = {y is an element of C : there is a sequence x(l) --> infinity s.t. f(x(l)) --> y and parallel todf(x(l))parallel to --> 0} is finite. We prove that the set (K) over tilde (f) - K-o(f) boolean OR (K) over tilde (infinity)(f) of generalized critical values of f (hence in particular the set of bifurcation points of f) has at most (d - 1)(n) points. Moreover, #(K) over tilde (infinity)(f) < (d - 1)(n-1). We also compute the set (K) over tilde (f) effectively.