Humphrey, David B. "Why Do Estimates of Bank Scale Economies Differ?," in Federal Reserve Bank of Richmond. "September-October 1990, Vol. 76," Economic Quarterly (Federal Reserve Bank of Richmond) (September-October 1990) : 36-48. https://fraser.stlouisfed.org/title/960/item/477362/toc/501810 , accessed on April 18, 2024.