Hirt, M. R.; Jetz, W.; Rall, B. C.; Brose, U. (2017). "A general scaling law reveals why the largest animals are not the fastest". Nature Ecology & Evolution.1 (8): 1116–1122. doi: 10.1038/s41559-017-0241-4
Washington Jones, Andrés Rinderknecht, Herculano Alvarenga, Felipe Montenegro & Martín Ubilla (2018). The last terror birds (Aves, Phorusrhacidae): new evidence from the late Pleistocene of Uruguay. PalZ. doi: https://doi.org/10.1007/s12542-017-0388-y