Tovstyuk, C. C.     Thermodynamic functions of electron gas in strongly anisotropic materials. Quantum gas [Текст] / C.C. Tovstyuk // Nanomaterials: application and properties NAP-2013 : 3-nd Intern. conf., Alushta, Crimea, Ukraine, 16-21 Sept., 2013 : sci. j. / Min. of Education and Science of Ukraine, Sumy State Univ. Publ. — Sumy, 2013. — P. 02NEA06-1-02NEA06-3.