homepages/168/7484,
Fernanda Polubriaginof and Fernanda C. Polubriaginof and Fernanda C. G. Polubriaginof, Home Page, https://www.wikidata.org/entity/Q89172227
homepages/168/0002-2,
Technical University of Applied Sciences Würzburg-Schweinfurt, Würzburg, Germany, Markus Ebner, Home Page, https://www.wikidata.org/entity/Q98511819
homepages/168/1975-2,
King Khalid University, Department of Mathematics, Abha, Saudi Arabia, Mohamed Abd El-Aziz, Home Page, https://www.wikidata.org/entity/Q103833339