PETRUȘEL, A. Book Reviews: Aram V. Arutyunov and Valeri Obukhovskii; Convex and Set-Valued Analysis. Selected Topics, De Gruyter Graduate, De Gruyter, Berlin 2017, viii+201 p., ISBN: 978-3-11- 046028-5 Pbk; 978-3-11-046030-8 Ebook. Stud. Univ. Babeş-Bolyai Math. 2022, 62, 137.