APA (7th ed.) Citation

Babenko, V. F., & Levchenko, D. A. (2013). Ridge approximation of some classes of harmonic functions.

Chicago Style (17th ed.) Citation

Babenko, V. F., and D. A. Levchenko. Ridge Approximation of Some Classes of Harmonic Functions. 2013.

MLA (8th ed.) Citation

Babenko, V. F., and D. A. Levchenko. Ridge Approximation of Some Classes of Harmonic Functions. 2013.

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