4Ohlson. J. A. Financialratios and the Probabilistic Prediction of bankruptcy. Journalof Accounting research. 1980, 18 (1): 109 - 130.
5Zavgren, Christine V. Assessing the Vulnerability to Failure of American Industrial Firms: A Logistic Analysis. Journal of Business Finance and Accounting . 1985, 12:19 -45.
