Alexei A. Maradudin, Veronica Pérez-Chávez, Arkadiusz Jędrzejewski, and Ingve Simonsen, Features in the diffraction of a scalar plane wave from doubly-periodic Dirichlet and Neumann surfaces: Распространение волн в неоднородных системах, Low Temp. Phys. 44, (2018) [Fiz. Nizk. Temp. 44, 933-945, (2018)] DOI: https://doi.org/10.1063/1.5041441.