Chen, J-Y., Hang, D-Y., and Li, C.W. An early Cambrian craniate-like chordate. Nature. December 1999, roč. 402, s. 518–522. Dostupné online [cit. 2008-09-23]. DOI10.1038/990080.
nature.com
Chen, J-Y., Hang, D-Y., and Li, C.W. An early Cambrian craniate-like chordate. Nature. December 1999, roč. 402, s. 518–522. Dostupné online [cit. 2008-09-23]. DOI10.1038/990080.