Araujo R, Castanhinha R, Martins R, Mateus O, Hendrickx C, Beckmann F, et al. Filling the gaps of dinosaur eggshell phylogeny: Late Jurassic Theropod clutch with embryos from Portugal. Sci Rep. 2013;3:1924 pubmed publisher
..Furthermore, these fossils allow unambiguous association of basal theropod osteology with a specific and unique new eggshell morphology. ..