5ROWLANDS I, NICHOLAS D, HAMID R J, et al. What do faculty and students really think about e-books [ J]. Aslib Pro- ceedings: New Information Perspectives, 2007, 59 (6) : 489- 511.
7NICHOLAS D, ROWLANDS I, CLARK D, et al. UK scholarly e-book usage : a landmark survey [ J ]. Aslib Proceedings : New Information Perspectives, 2008, 60 (4) : 311-334.
9ANURADHA K T, USHA H S. Use of e-books in an academic and research environment [ J] . Program: Electronic Library and Information Systems , 2006, 40 (1) : 48-62.
10SHELBURNE W A. E-book usage in an academic library: user attitudes and behaviors [ J]. Library Collections, Acquisitions & Technical Services , 2009 (33) : 59-72.