APA (7th ed.) Citation

Albeverio, S., Kuzhel, S., & Nizhnik, L. (2007). Singularly perturbed self-adjoint operators in scales of Hilbert spaces. Український математичний журнал.

Chicago Style (17th ed.) Citation

Albeverio, S., S. Kuzhel, and L. Nizhnik. "Singularly Perturbed Self-adjoint Operators in Scales of Hilbert Spaces." Український математичний журнал 2007.

MLA (8th ed.) Citation

Albeverio, S., et al. "Singularly Perturbed Self-adjoint Operators in Scales of Hilbert Spaces." Український математичний журнал, 2007.

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