Ter Maat, A., Geraerts, W. P. M., Jansen, R. F., & Bos, N. P. A. (1988). Chemically
mediated positive feedback generates long-lasting afterdischarge in a molluscan neuroendocrine system.
Brain Research, 438(1-2), 77-82. doi:10.1016/0006-8993(88)91325-x.