Pratt, G. W. Theory and Complex Plasmas, MPI for Extraterrestrial Physics, Max Planck Society;
Arnaud, M., Pratt, G. W., & Pointecouteau, E. (2004). Structural and scaling properties of galaxy clusters: probing the physics of structure formation. Memorie della Societa Astronomica Italiana, 75, 529-537. Retrieved from http://sait.oat.ts.astro.it/MmSAI/75/PDF/529.pdf.