Ito, Hiroshi Memory and Navigation Circuits Group, Max Planck Institute for Brain Research, Max Planck Society;
https://www.ncbi.nlm.nih.gov/pubmed/19225586 (Any fulltext)
Ito, H., & Schuman, E. M. (2008). Frequency-dependent signal transmission and modulation by neuromodulators. Front Neurosci, 2(2), 138-144.