Duality for Nonconvex Approximation and Optimization
  MLA
  Singer, Ivan, Jonathan Borwein, and Karl Dilcher. Duality for Nonconvex Approximation and Optimization. Springer New York, 2006.
  APA
  Singer, I., Borwein, J., & Dilcher, K. (2006). Duality for Nonconvex Approximation and Optimization. Springer New York.
  Chicago
  Singer, Ivan, Jonathan Borwein, and Karl Dilcher. Duality for Nonconvex Approximation and Optimization. : Springer New York, 2006.