Helmstaedter, Moritz Connectomics Department, Max Planck Institute for Brain Research, Max Planck Society;
http://www.ncbi.nlm.nih.gov/pubmed/18802122 (Any fulltext)
Helmstaedter, M., Sakmann, B., & Feldmeyer, D. (2009). L2/3 interneuron groups defined by multiparameter analysis of axonal projection, dendritic geometry, and electrical excitability. Cereb Cortex, 19(4), 951-62. doi:10.1093/cercor/bhn130.