1. “Generalized gradient methods of minimizing a functional,”;Altman;Bull. Acad. Polon. Sci.,1966
2. “A generalized gradient method for the conditional minimum of a functional,”;Altman;Bull. Acad. Polon. Sci.,1966
3. “Minimization of functions having Lipschitz continuous first partial derivatives,”;Armijo;Pacific J. Math.,1966
4. Cea, J. (1969), “Methode numerique d'optimisation,” lecture notes from ℓ ‘Ecole d’ Ete Analyse Numerique, France.
5. Cross, K. E. (1968), “A gradient projection method for constrained optimization,” Union Carbide Nuclear Division Report K-1746.