APA (7th ed.) Citation

Addison, J. A., & Howison, S. D. (2006). Ray methods for free boundary problems. Quarterly of Applied Mathematics, 64(1), 41.

Chicago Style (17th ed.) Citation

Addison, J. A., and S. D. Howison. "Ray Methods for Free Boundary Problems." Quarterly of Applied Mathematics 64, no. 1 (2006): 41.

MLA (9th ed.) Citation

Addison, J. A., and S. D. Howison. "Ray Methods for Free Boundary Problems." Quarterly of Applied Mathematics, vol. 64, no. 1, 2006, p. 41.