@article {stanimirovic2019varying,
	title = {Varying-parameter Zhang neural network for approximating some expressions involving outer inverses},
	journal = {Optimization Methods and Software},
	year = {2019},
	pages = {1{\textendash}27},
	publisher = {Taylor \& Francis},
	author = {Predrag S. Stanimirovi{\'c} and Vasilios N. Katsikis and Zhang, Zhijun and Shuai Li and Chen, Jianlong and Zhou, Mengmeng}
}
