APA (7th ed.) Citation

Amster, P., & Nápoli, P. D. A nonlinear second order problem with a nonlocal boundary condition. Wiley.

Chicago Style (17th ed.) Citation

Amster, P., and P. De Nápoli. A Nonlinear Second Order Problem With a Nonlocal Boundary Condition. Wiley.

MLA (9th ed.) Citation

Amster, P., and P. De Nápoli. A Nonlinear Second Order Problem With a Nonlocal Boundary Condition. Wiley.

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