Estimates for the Nash-Sofer Preconditioner for the Reduced Hessian for Some Elliptic Variational Inequalities. - T. D. Choi; Carl T. Kelley (SIAM J. Optim., 1999)

Superlinear Convergence and Implicit Filtering. - T. D. Choi; C. T. Kelley (SIAM J. Optim., 2000)