Max Planck Institute for Biological Intelligence News from the Institute Zebra finch males sing in dialects and females pay attention Publications of Aline Kuhl All genres Journal Article (1) Journal Article (1) 2003 Journal Article Michiels, N. K.; Kuhl, A.: Altruistic sperm donation in a sperm-dependent parthenogenetic hermaphrodite is stabilized by reciprocal sperm exchange. Journal of Zoology 259 (1), pp. 77 - 82 (2003) MPG.PuRe DOI