Ricciardi, K. L., Pinder, G. F., & Belitz, K. (2005). Comparison of the lognormal and beta distribution functions to describe the uncertainty in permeability.
Journal of Hydrology, 313(3-4), 248-256.
Law, J. (1944). A statistical approach to the interstitial heterogeneity of sand reservoirs. Transactions of the AIME, 155(01), 202-222.