homepages/33/1254-2,
Northwest University, Department of Mathematics and Department of Computer Science, Xi'an, China, Ke Lu and Ke Lv, Home Page, https://orcid.org/0000-0003-0176-3088
homepages/189/6459,
Beijing Institute of Technology, School of Mechatronical Engineering, Jiaxing, China, Xiao-jian Yi and Xiaojian Yi, Home Page, https://www.wikidata.org/entity/Q91839106
homepages/54/8052-5,
University of Electronic Science and Technology of China, Chengdu, Sichuan, China, Jiaheng Wang, Home Page, https://orcid.org/0000-0002-5884-5933
homepages/54/4749,
Ruhr University Bochum, Faculty of Mathematics, Germany, Hans Simon and Hans Ulrich Simon, Home Page, https://orcid.org/0000-0002-1587-0944