  Let M be a closed n-dimensional manifold, n > 2, whose first real cohomology
group H 1 (M ; R) is non-zero. We present a general method for constructing a
Morse 1-form $\alpha$ on M , closed but non-exact, and a pseudo-gradient X such
that the differential $\partial$ X of the Novikov complex of the pair
($\alpha$, X) has at least one incidence coefficient which is an infinite
series. This is an application of our previous study of the homoclinic
bifurcation of pseudo-gradients of multivalued Morse functions.
