8Stiglitz ,J. E. , Weiss Andrew. 1981. "Credit Rationing in Market with Imperfect Information" . The American Economic Review, 71 (3) :393 -410.
9Cressy, R. , Olofsson Christer. 1997. "The financial conditions for Swedish SMEs : Survey and Research Agenda". Small Business Economics, 9(2) :179 - 194.