Beckand, T. and Demirguc-Kunt, A. (2006) Small and Medium Size Enterprises: Access to Finance as a Growth Constraint. Journal of Banking and Finance, 30, 2931-2943.
 Berger A.N. and Udell, G.F. (2006) A More Complete Conceptual Framework for SME Finance. Journal of Banking and Finance. 30, 2945-2966.
 Lv, H.J. (2013) SME Financing Difficulties and Countermeasures. Central China Normal University, Wuhan.
 Li, Q.L. (2013) Innovation—Research on Financing Mode of SME—Exploration of the Financing Platform for SME. Zhejiang University, Hangzhou.
 He F.F. (2012) SME External Financing Difficulties and Solutions. Corporation Research, 251-252.