On the Feasibility of Extrapolation of the Complex Electromagnetic Permittivity Function Using Kramers-Kronig Relations. - Yury Grabovsky; Narek Hovsepyan (SIAM J. Math. Anal., 2021)

On the Lack of External Response of a Nonlinear Medium in the Second-Harmonic Generation Process. - Fioralba Cakoni; Narek Hovsepyan; Matti Lassas; Michael Vogelius (SIAM J. Math. Anal., 2025)