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COBZAȘ, S. Afif Ben Amar and Donal O’Regan; Topological Fixed Point Theory for Singlevalued and Multivalued Mappings and Applications, Cham: Springer, 2016, , x+194 P. ISBN: 978-3-319-31947-6 Hbk; 978-3-319-31948-3 Ebook. Stud. Univ. Babeş-Bolyai Math. 2023, 61, 390-391.