Reference

Alberto Valero-Gracia, Rita Marino, Fabio Crocetta, Valeria Nittoli, Stefano Tiozzo, Paolo Sordino (2016): Comparative localization of serotonin-like immunoreactive cells in Thaliacea informs tunicate phylogeny – Frontiers in Zoology – 2016: 45-0001-45-0012.