Rüscher, Claus H., et al. “18O/16O/Exchange/Studies/in/Bi2/(GaxAl1−x)4O9:/Oxygen/Diffusion/Coefficients/Estimated/from/Infrared/Absorption/and/XRD/Powder/Data”. Diffusion Fundamentals, vol. 12, June 2010, doi:10.62721/diffusion-fundamentals.12.380.