APA (7th ed.) Citation

Ptashnyk, B. Y., & Repetylo, S. M. (2014). Dirichlet – Neumann problem for systems of hyperbolic equations with constant coefficients.

Chicago Style (17th ed.) Citation

Ptashnyk, B. Y., and S. M. Repetylo. Dirichlet – Neumann Problem for Systems of Hyperbolic Equations with Constant Coefficients. 2014.

MLA (8th ed.) Citation

Ptashnyk, B. Y., and S. M. Repetylo. Dirichlet – Neumann Problem for Systems of Hyperbolic Equations with Constant Coefficients. 2014.

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