Endeward, Burkhard, Marcelino Bernardo, Hans Thomann, and P. Brandt. “Ionic Aggregation in Metallocene Olefin Polymerization Catalysts: A PFG NMR Study”. Diffusion Fundamentals 3 (September 25, 2005). Accessed June 4, 2025. https://diffusion.publia.org/diffusion/article/view/341.