For citations:
Abdullaev J.I., Khalkhuzhaev A.M., Usmonov L.S. Monotonicity of the eigenvalues of the two-particle Schrӧdinger operator on a lattice. Nanosystems: Physics, Chemistry, Mathematics. 2021;12(6):657-663. https://doi.org/10.17586/2220-8054-2021-12-6-657-663