Chen, Son-Nan. Re-Examining the Market Model Given Evidence of Heteroskedasticity. Journal of Financial Research, 1979, 2 (2): 111-118.

Bradford, William D.. Minority Savings and Loan Associations: Hypotheses and Tests. Journal of Financial and Quantitative Analysis, 1978, 13 (3): 533-547.

Bradford, William D., Alfred E. Osborne, Jr., and Lewis Spellman. The Efficiency and Profitability of Minority Controlled Savings and Loan Associations. Journal of Money, Credit and Banking, 1978, 10 (1): 65-74.

Bradford, William D.. The Performance of Merging Savings and Loan Associations. Journal of Business Research, 1978, 51 (1): 115-125.

Spellman, Lewis, Alfred E. Osborne, and William D. Bradford. The Comparative Operating Efficiency of Black Savings and Loan Associations. Journal of Finance, 1977, 32 (2): 565-574.