COBZAȘ, S. 2015. Francesco Altomare, Mirella Cappelletti Montano, Vita Leonessa, Ioan Rasa; Markov operators, positive semigroups and approximation processes, De Gruyter Studies in Mathematics, vol. 61, Walter de Gruyter, Berlin, 2014, xi+ 313 pp. ISBN 978-3-11-037274-8/. Studia Universitatis Babeș-Bolyai Mathematica. 60, 3 (Sep. 2015), 487–488.