ZZ Ceti Stars: Fractal Analogues of Excited Helium Ions?
  Multi-periodic pulsation phenomena of ZZ Ceti variable stars are analyzed within the context of a fractal cosmological paradigm that emphasizes discrete self-similarity in nature. A quantitative test comparing relevant stellar and atomic periods provides preliminary support for the analysis. This paper completes a 3-part series that explores the possibility of discrete cosmological self-similarity in variable stars; the first and second papers discussed RR Lyrae and delta Scuti stars, respectively. 
R. L. Oldershaw