- A. L. Larsen, N. Sánchez, “From the WZWN model to the Liouville equation: Exact string dynamics in a conformally invariant AdS background”, Phys. Rev. D, 58, № 12, 1998, 126002
- A. L. Larsen, N. Sánchez, “sinh-Gordon, cosh-Gordon, and Liouville equations for strings and multistrings in constant curvature spacetimes”, Phys. Rev. D, 54, № 4, 1996, 2801