1. Andrei, N.: Computational experience with conjugate gradient algorithms for large-scale unconstrained optimization. (Technical Report, Research Institute for Informatics-ICI, Bucharest, July 21) (1995)
2. Andrei, N.: Programarea matematică avansată. Teorie, Metode computaţionale, Aplicaţii. [Advanced Mathematical Programming. Theory, Computational Methods, Applications]. Editura Tehnică, Bucureşti (1999a)
3. Andrei, N.: Critica Raţiunii Algoritmilor de Optimizare fără Restricţii. [Criticism of the Unconstrained Optimization Algorithms Reasoning]. Editura Academiei Române, Bucureşti (2009e)
4. Andrei, N.: Critica Raţiunii Algoritmilor de Optimizare cu Restricţii. [Criticism of the Constrained Optimization Algorithms Reasoning]. Editura Academiei Române, Bucureşti (2015a)
5. Andrei, N.: Nonlinear Conjugate Gradient Methods for Unconstrained Optimization. Springer Optimization and Its Applications Series, vol. 158. Springer Science + Business Media, New York (2020a)