Godwin-Austen, H. (1866). "On the Carboniferous Rocks of the Valley of Kashmere: with Notes on the Brachiopoda collected by Capt. Godwin-Austen in Thibet and Kashmere, by T. Davidson, Esq., F.R.S., F.G.S". Quarterly Journal of the Geological Society. 22 (1–2): i–639 [37]. doi:10.1144/GSL.JGS.1866.022.01-02.08. S2CID129858073.
Godwin-Austen, H. (1866). "On the Carboniferous Rocks of the Valley of Kashmere: with Notes on the Brachiopoda collected by Capt. Godwin-Austen in Thibet and Kashmere, by T. Davidson, Esq., F.R.S., F.G.S". Quarterly Journal of the Geological Society. 22 (1–2): i–639 [37]. doi:10.1144/GSL.JGS.1866.022.01-02.08. S2CID129858073.