Jaeger, P. T., J. C. Bertot, C. M. Kodama, S. M. Katz, and E. J. DeCoster. “Describing and Measuring the Value of Public Libraries: The Growth of the Internet and the Evolution of Library Value”. First Monday, vol. 16, no. 11, Oct. 2011, doi:10.5210/fm.v16i11.3765.