The famous article

Doron Witztum, Eliyahu Rips and Yoav Rosenberg,
Equidistant letter sequences in the Book of Genesis,
Statistical Science, vol. 9, no. 3 (1994), pp. 429-438

• An explanation by Harold Gans
• Discussions by Jim Ober: here and here.
• "Significant or insignificant?" by Robert Haralick

Much more discussions and (rather rare) explanations can be found through "Links to other sites" on my Torah puzzle page.

My explanations:

• But why use a complicated technique?
• Steps of the computation