1. Chen, P. J. Distribution and migration of Jehol fauna with reference to nonmarine Jurassic–Cretaceous boundary in China. Acta Palaeontol. Sin. 27, 659–683 (1988).
2. Hou, L.-H., Zhang, J.-Y., Martin, L. D. & Feduccia, A. Abeaked bird from the Jurassic of China. Nature 377, 616–618 (1995).
3. Hou, L.-H., Martin, L. D., Zhang, J.-Y. & Feduccia, A. Early adaptive radiation of birds: evidence from fossils from northeastern China. Science 274, 1164–1167 (1996).
4. Ji, Q. & Ji, S. A. On discovery of the earliest bird fossil in China and the origin of birds. Chinese Geol. 233, 30–33 (1996).
5. Chen, P. J. et al. Studies on the Late Mesozoic continental formations of western Liaoning. Bull. Nanjing Inst. Geol. Palaeontol. 1, 22–25 (1980).