  In this paper we prove uniqueness in the inverse boundary value problem for
quasilinear elliptic equations whose linear part is the Laplacian and nonlinear
part is the divergence of a function analytic in the gradient of the solution.
The main novelty in terms of the result is that the coefficients of the
nonlinearity are allowed to be "anisotropic". As in previous works, the proof
reduces to an integral identity involving the tensor product of the gradients
of 3 or more harmonic functions. Employing a construction method using Gaussian
quasi-modes, we obtain a convenient family of harmonic functions to plug into
the integral identity and establish our result.
