Brasier, Martin; Cotton, Laura; Yenney, Ian. First report of amber with spider webs and microbial inclusions from the earliest Cretaceous (c. 140 Ma) of Hastings, Sussex (англ.) // Journal of the Geological Society[англ.] : journal. — 2009. — Vol. 166, no. 6. — P. 989—997. — doi:10.1144/0016-76492008-158.
Brasier, Martin; Cotton, Laura; Yenney, Ian. First report of amber with spider webs and microbial inclusions from the earliest Cretaceous (c. 140 Ma) of Hastings, Sussex (англ.) // Journal of the Geological Society[англ.] : journal. — 2009. — Vol. 166, no. 6. — P. 989—997. — doi:10.1144/0016-76492008-158.