Fricke, Hans Verhaltensphysiologie, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Gorr, T., Kleinschmidt, T., & Fricke, H. (1991). Close tetrapod relationships of the coelacanth Latimeria indicated by haemoglobin sequences. Nature, 351(6325), 394-397. doi:10.1038/351394a0.