Nonlinear Approximation Theory (Dietrich Braess). - Frank Deutsch (SIAM Rev., 1990)

Two generalizations of Dykstra's cyclic projections algorithm. - Hein Hundal; Frank Deutsch (Math. Program., 1997)

Best Approximation from the Intersection of a Closed Convex Set and a Polyhedron in Hilbert Space, Weak Slater Conditions, and the Strong Conical Hull Intersection Property. - Frank Deutsch; Wu Li; Joseph D. Ward (SIAM J. Optim., 1999)

Lower Semicontinuity Concepts, Continuous Selections, and Set Valued Metric Projections. - A. L. Brown; Frank Deutsch; V. Indumathi; Petar S. Kenderov (J. Approx. Theory, 2002)

Approximating weak Chebyshev subspaces by Chebyshev subspaces. - Frank Deutsch; Larry L. Schumaker; Zvi Ziegler (J. Approx. Theory, 2003)

The rate of convergence for the cyclic projections algorithm I: Angles between convex sets. - Frank Deutsch; Hein Hundal (J. Approx. Theory, 2006)

The rate of convergence for the cyclic projections algorithm II: Norms of nonlinear operators. - Frank Deutsch; Hein Hundal (J. Approx. Theory, 2006)

The rate of convergence for the cyclic projections algorithm III: Regularity of convex sets. - Frank Deutsch; Hein Hundal (J. Approx. Theory, 2008)

Characterizing arbitrarily slow convergence in the method of alternating projections. - Heinz H. Bauschke; Frank Deutsch; Hein Hundal (Int. Trans. Oper. Res., 2009)

Slow convergence of sequences of linear operators I: Almost arbitrarily slow convergence. - Frank Deutsch; Hein Hundal (J. Approx. Theory, 2010)

Slow convergence of sequences of linear operators II: Arbitrarily slow convergence. - Frank Deutsch; Hein Hundal (J. Approx. Theory, 2010)

Arbitrarily Slow Convergence of Sequences of Linear Operators: A Survey. - Frank Deutsch; Hein Hundal (Fixed-Point Algorithms for Inverse Problems in Science and Engineering, 2011)

Characterizing best isotone approximations in Lp spaces, 1≤p<∞. - Frank Deutsch; Vasant A. Ubhaya (J. Approx. Theory, 2016)