Comments on: "A family of derivative-free conjugate gradient methods for large-scale nonlinear systems of equations" [J. Comput. Appl. Math. 224(2009) 11-19]. - Li Zhang; Shuyuan Jian (J. Comput. Appl. Math., 2012)

Further studies on the Wei-Yao-Liu nonlinear conjugate gradient method. - Li Zhang; Shuyuan Jian (Appl. Math. Comput., 2013)