N. Andrei, A diagonal quasi-Newton updating method for unconstrained optimization. Numerical Algorithms. Accepted: June 12, 2018
N. Andrei, A diagonal quasi-Newton updating method based on minimizing the measure function of Byrd and Nocedal for unconstrained optimization. Optimization. A Journal of Mathematical Programming and Operations Research, Accepted: May 24, 2018
N. Andrei, A double parameter scaling Broyden-Fletcher-Goldfarb-Shanno method based on minimizing the measure function of Byrd and Nocedal for unconstrained optimization. Journal of Optimization Theory and Applications (JOTA), Accepted: April 22, 2018. (DOI: 10.1007/s10957-018-1288-3)
N. Andrei, Another conjugate gradient algorithm with guaranteed descent and conjugacy conditions for large-scale unconstrained optimization.
Journal of Optimization Theory and Applications. vol. 159 (2013), pp.159-182. DOI 10.1007/s10957-013-0285-9 (2013)
Journal of Computational and Applied Mathematics. vol. 241 (2013), pp. 19-29. [This paper is dedicated to the memory of Neculai Gheorghiu (1930–2009), my professor of Mathematical Analysis, Faculty of Mathematics, " Alexandru Ioan Cuza" University, Iasi, Romania.]