Optical conductivity in the t − J model

Optical conductivity in dynamic Hubbard model

Optical conductivity of the two-dimensional Hubbard model

Optical conductivity in a simple model of the pseudogap state

Analytical approach to the t—t′—J model: Quasi-particle dispersion, Fermi surface and optical conductivity

Optical conductivity of the Hubbard model in the strong coupling regime

Small parameter and optical conductivity in the migdal-type description of t-t′-J model.