Maier, I., Müller, D. G., & Boland, W. (1994). Spermatozoid chemotaxis in Laminaria
digitata (Phaeophyceae). III. Pheromone receptor specificity and threshold concentrations. Zeitschrift
für Naturforschung, C: Journal of Biosciences, 49(9-10), 601-606. doi:10.1515/znc-1994-9-1010.