APA (7th ed.) Citation

Petrina, D. Y., & Петрина, Д. Я. (2005). New second branch of the spectrum of the BCS Hamiltonian and a “pseudogap”. Institute of Mathematics, NAS of Ukraine.

Chicago Style (17th ed.) Citation

Petrina, D. Ya., and Д. Я Петрина. New Second Branch of the Spectrum of the BCS Hamiltonian and a “pseudogap”. Institute of Mathematics, NAS of Ukraine, 2005.

MLA (8th ed.) Citation

Petrina, D. Ya., and Д. Я Петрина. New Second Branch of the Spectrum of the BCS Hamiltonian and a “pseudogap”. Institute of Mathematics, NAS of Ukraine, 2005.

Warning: These citations may not always be 100% accurate.