Optimal homotopy methods for solving nonlinear systems. Part 1. Nonsingular homotopy paths. L.-Q. Zhang, G.-Q. Han (1993) Numerische Mathematik
Optimal Iterative Processes for Root-Finding. S. Winograd, Richard Brent, P. Wolfe (1972/1973) Numerische Mathematik
Optimal problems concerning interpolation methods of solution of equations. Păvăloiu, Ion (1992) Publications de l'Institut Mathématique. Nouvelle Série
Optimal Solution of Nonlinear Equations Satisfying a Lipschitz Condition. K. Sikorski (1984) Numerische Mathematik
Optimum choice of initial approximations in interpolation methods of solving equations S. Paszkowski (1971) Applicationes Mathematicae