Guitart-Masip, M., Salami, A., Garrett, D. D., Rieckmann, A., Lindenberger, U., & Bäckman, L. (2016). BOLD variability is related to dopaminergic neurotransmission and cognitive aging. Cerebral Cortex, 26(5), 2074-2083. doi:10.1093/cercor/bhv029.