For citations:

Khalkhuzhaev A.M., Khayitova Kh.G., Khujamiyorov I.A. On the spectrum of the Schrödinger operator for a three-particle system on a lattice. Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki. 2025;167(3):547-565. (In Russ.) https://doi.org/10.26907/2541-7746.2025.3.547-565