Bangasser, D. ., Waxler, D. ., Santollo, J. ., & Shors, T. . (2006). Trace conditioning and the hippocampus: the importance of contiguity. The Journal of Neuroscience : The Official Journal of the Society for Neuroscience, 26(34), 8702-6. https://doi.org/10.1523/JNEUROSCI.1742-06.2006 (Original work published 2006)