Wave Propagation in a 2-D Optical Waveguide. - Fadil Santosa; Rolando Magnanini (SIAM J. Appl. Math., 2001)

On Complex-Valued Solutions to a Two-Dimensional Eikonal Equation. II. Existence Theorems. - Rolando Magnanini; Giorgio Talenti (SIAM J. Math. Anal., 2003)