PETRUȘEL, Adrian. “Book Reviews: ‘John R. Graef, Johnny Henderson, Abdelghani Ouahab; Topological Methods for Differential Equations and Inclusions’, CRC Press, Taylor & Francis Group, Boca Raton, FL, USA, 2019, Xiv + 360 pp., ISBN 9781138332294 - CAT# K393112”. Studia Universitatis Babeș-Bolyai Mathematica, vol. 65, no. 1, Mar. 2020, pp. 161-2, https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/2436.