PETRUȘEL, A. 2022. 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. Studia Universitatis Babeș-Bolyai Mathematica. 62, 1 (Oct. 2022), 137.