Σουμπενιώτης Δ. Ν., Γεωργόπουλος Ν. Β., and Πέκκα - Οικονόμου Β., “The usefulness of commercial bank portfolio behavior modelling: retrospection and prospects”, SPOUDAI, vol. 51, no. 1-2, pp. 22–39, Jan. 2001.