  We study classical spin networks with group SU(2). In the first part, using
gaussian integrals, we compute their generating series in the case where the
networks are equipped with holonomies; this generalizes Westbury's formula. In
the second part, we use an integral formula for the square of the spin network
and perform stationary phase approximation under some non-degeneracy
hypothesis. This gives a precise asymptotic behavior when the labels are
rescaled by a constant going to infinity.
