On Sturm Sequences for Tridiagonal Matrices. - James M. Ortega (J. ACM, 1960)

The LLT and QR methods for symmetric tridiagonal matrices. - James M. Ortega; Henry F. Kaiser (Comput. J., 1963)

Generation of test matrices by similarity transformations. - James M. Ortega (Commun. ACM, 1964)

Iterative solution of nonlinear equations in several variables. - James M. Ortega; Werner C. Rheinboldt (Academic Press, 1970)

The heart of computer science. - Norman E. Gibbs; Donald W. Loveland; James M. Ortega (ACM SIGCSE Bull., 1974)

Numerical analysis position. - James M. Ortega (ACM SIGCSE Bull., 1974)

A multi-color SOR method for parallel computation. - Loyce M. Adams; James M. Ortega (ICPP, 1982)

The ijk forms of factorization methods I. Vector computers. - James M. Ortega (Parallel Comput., 1988)

The ijk forms of factorization methods II. Vector computers. - James M. Ortega (Parallel Comput., 1988)

Parallel solution of triangular systems of equations. - Charles H. Romine; James M. Ortega (Parallel Comput., 1988)

Multicoloring with lots of colors. - D. L. Harrar; James M. Ortega (ICS, 1989)

Efficient Polynomial Preconditioning for the Conjugate Gradient Method. - Stanley C. Eisenstat; James M. Ortega; Courtenay T. Vaughan (SIAM J. Sci. Comput., 1990)

Orderings for Conjugate Gradient Preconditionings. - James M. Ortega (SIAM J. Optim., 1991)

Fast Solution of Nonlinear Poisson-Type Equations. - Brett M. Averick; James M. Ortega (SIAM J. Sci. Comput., 1993)

Model-based boundary estimation of complex objects using hierarchical active surface templates. - John W. Snell; Michael B. Merickel; James M. Ortega; John C. Goble; James R. Brookeman; Neal F. Kassell (Pattern Recognit., 1995)

Segmentation of volumetric medical imagery using multiple geodesic-based active surfaces. - David J. Schlesinger; John W. Snell; Lois E. Mansfield; James R. Brookeman; James M. Ortega; Neal F. Kassell (Image Processing, 1996)

Orderings for Parallel Conjugate Gradient Preconditioners. - S. A. Stotland; James M. Ortega (SIAM J. Sci. Comput., 1997)