8Altman, E. I.. A Further Empirical Investigation of the Bankruptcy Cost Question. Journal of Finance, 1984, (39): 1067-1089.
9Andrade, G., S. N. Kaplan. How Costly is Financial (not Economic)Distress? Evidence from Highly Leveraged Transactions that Became Distressed. Journal of Finance, 1998, (53): 1443-1493.
10Whitaker, R. B.. The Early Stages of Financial Distress. Journal of Economics and Finance, 1999, (23): 123-133.