Quizá quiso decir: SEP 80/27. Reviews in Fluorescence, 1573-8086 ; 2005 International Series in Operations Research & Management Science, 0884-8289 ; 80 Nonconvex Optimization and Its Applications, 1571-568X ; 80 Reviews in Fluorescence, 1573-8086 ; 2006 Fundamental Issues in Archaeology, 1567-8040 Reviews in Fluorescence, 1573-8086 ; 2007 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 19 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 23 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 24 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 25 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 26 The GeoJournal Library, 0924-5499 ; 80 International Library of Ethics, Law, And the New Medicine, 1567-8008 ; 27 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 28 International Library of Ethics, Law and the New Medicine, 1567-8008 ; 29 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 30 Fluid Mechanics And Its Applications, 0926-5112 ; 80 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 31 International Library of Ethics, Law, and the New Medicine, 1567-8008 ; 32