Для цитирования:

 ,  ,   . Наносистемы: физика, химия, математика. 2022;13(3):245-249. https://doi.org/10.17586/2220-8054-2022-13-3-245-249

For citation:

Blinova I.V., Popov A.I., Bosova A.A. Spectral gaps for star-like quantum graph and for two coupled rings. Nanosystems: Physics, Chemistry, Mathematics. 2022;13(3):245-249. https://doi.org/10.17586/2220-8054-2022-13-3-245-249