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Zbinden, Marc; Mazzi, Dominique; Künzler, Reto; Largiadèr, Carlo R.; Bakker, Theo C. M. (2003). Courting virtual rivals increase ejaculate size in sticklebacks (Gasterosteus aculeatus). Behavioral ecology and sociobiology, 54(3), pp. 205-209. Springer-Verlag 10.1007/s00265-003-0612-5
