E.J. Garboczi, Three-dimensional mathematical analysis of particle shape using X-ray tomography and spherical harmonics: Application to aggregates used in concrete, Cem. Conc. Res. 32 2002 1621-1638.
 E.J. Garboczi, S. Erdogan, P. Quiroga, D.W. Fowler, H.A. Saleh, R.S. Livingston, P.M. Ketcham, and S.G. Satterfield, Three-dimensional shape analysis of coarse aggregates: Methodology and preliminary results on several different coarse aggregates, in preparation.
 D.P. Bentz, S. Mizell, S.G. Satterfield, J.E. Devaney, William George, P.M. Ketcham, J.R. Graham, J.E. Porterfield, D.A. Quenard, F. Vallee and H. Sallee, The Visible Cement Data Set, J. Res. Nat. Inst. Stds. Tech. 107 2002 137-148. See also http://visiblecement.nist.gov.
 Information about the Cement and Concrete Reference Laboratory can be found at www.ccrl.us.
 D.P. Bentz,Three-dimensional computer simulation of portland cement hydration and microstructure development, J. Amer. Ceram. Soc. 80 1997 3-21.
 Y.Chen and I. Odler, On the origin of portland-cement setting, Cem. Conc. Res. 22 1992 1130-1140.
 A.C. Kak and M. Slaney, Principles of Computerized Tomographic Imaging, SIAM, Philadelphia, 2001.
 G. Pólya and G. Szegö, Isoperimetric Inequalities in Mathematical Physics, Princeton University Press, Princeton, NJ, 1951.
 D.P. Bentz and P.E. Stutzman, SEM analysis and computer modeling of hydration of portland cement particles, in: S.M. DeHayes and D. Stark (Eds.), Petrography of Cementitious Material, ASTM, Philadelphia, 1994, pp. 60-73.
 C.F. Ferraris, V.A. Hackley, and A.I. Avilés, Measurement of particle size distribution in portland cement powder: Analysis of ASTM round-robin studies, Cement, Concrete, and Aggregates 22 2004 71-81.