Wicks, D. (2010). Coding: Axial coding. In A. J. Mills, G. Durepos, & E. Wiebe (Eds.), Encyclopedia of case study research (pp. 154–155). Thousand Oaks, CA: Sage.

Wicks elaborates on axial (second stage) coding as a process of linking dimensions of concepts – much as I have described pattern coding, and provides a clear, concise example of how this was used to connect concepts in a study of a mine disaster.