Conodont and ammonoid biostratigraphies around the Permian-Triassic boundary from the Jianzishan of South China
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DOI: 10.1007/s12583-017-0754-4
Abstract: Conodonts and ammonoids have played significant roles in the Permian-Triassic timescale. In order to uncover the nature of the Permian-Triassic mass extinction and subsequent recovery, we studied conodont and ammonoid biostratigraphies around the Permian-Triassic boundary… read more here.
Keywords: permian triassic; conodont ammonoid; ammonoid biostratigraphies; boundary ... See more keywords
Asymptotic stability of a free boundary problem for the growth of multi-layer tumours in the necrotic phase
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DOI: 10.1088/1361-6544/ab15a8
Abstract: In this paper we study a free boundary problem for the growth of multi-layer tumours in the necrotic phase. The tumour region is strip-like and divided into a necrotic region and a proliferating region with… read more here.
Keywords: problem growth; boundary problem; free boundary; boundary ... See more keywords