homepages/174/3138-1,
Universidade Federal do Ceará, ParGO Research Group, Fortaleza, Brazil, Raul Lopes, Home Page, https://orcid.org/0000-0002-7487-3475
homepages/174/8392,
University of Florida, Gainesville, FL, USA, David P. Arnold and David Arnold, Home Page, https://www.wikidata.org/entity/Q87675034
homepages/174/2192,
University of Udine, Department of Mathematics and Computer Science, Italy, Stefano Tognazzi, Home Page, https://orcid.org/0000-0002-3557-2426