Hermann, P. M., de Lange, R. P. J., Pieneman, A. W., Ter Maat, A., & Jansen, R. F. (1997). Role of neuropeptides encoded on CDCH-1 gene in the organization of egg-laying behavior in the pond snail, Lymnaea stagnalis. Journal of Neurophysiology, 78(6), 2859-2869.