Gaps in the Theory of Islamic Finance, JKAU: Islamic Econ., Vol. 26 No. 1, pp: 243-254 (2013 A.D./1434 A.H.)

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0CCkQFjACahUKEwiuyObzwv3HAhUGPxoKHfeqAQw&url=http%3A%2F%2Fiei.kau.edu.sa%2FGetFile.aspx%3Fid%3D185139%26Lng%3DEN%26fn%3D11-Mabid.pdf&usg=AFQjCNHo1QX5RfhPvmlHFOglLp6S3sN7AQ&sig2=Lu2lok-vYVj_oPI_XFlMTw&bvm=bv.102829193,d.d24

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http://www-stud.rbi.informatik.uni-frankfurt.de/~osman/IslamicBankingandFinance.pdf