KOLUMBÁN, J. 2015. Saleh A. R. Al-Mezel, Falleh R. M. Al-Solamy and Qamrul H. Ansari, Fixed Point Theory, Variational Analysis, and Optimization, CRC Press, Taylor & Francis Group, Boca Raton 2014, xx + 347 pp, ISBN: 13: 978-1-4822-2207-4. Studia Universitatis Babeș-Bolyai Mathematica. 60, 1 (Mar. 2015), 145–146.