- S. A. Nazarov, “Waves in a Plane Rectangular Lattice of Thin Elastic Waveguides”, J Math Sci, 242, № 2, 2019, 227
- Sylvain Golénia, Françoise Truc, “The Essential Spectrum of the Discrete Laplacian on Klaus-sparse Graphs”, Math Phys Anal Geom, 23, № 4, 2020, 45