APA (7th ed.) Citation

Folkman, J., & Shapiro, N. (1968). Approximating one convex function by another. SIAM Journal on Applied Mathematics, 16, 993.

Chicago Style (17th ed.) Citation

Folkman, J., and N. Shapiro. "Approximating One Convex Function by Another." SIAM Journal on Applied Mathematics 16 (1968): 993.

MLA (9th ed.) Citation

Folkman, J., and N. Shapiro. "Approximating One Convex Function by Another." SIAM Journal on Applied Mathematics, vol. 16, 1968, p. 993.