PETRUȘEL A. 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. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2020 Mar. 6 [cited 2025 Sep. 1];65(1):161-2. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/2436