Pteraspis (Ukrainian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pteraspis" in Ukrainian language version.

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Lankester, E. R. (1870). I.—On a New Cephalaspis Discovered in America, etc. Geological Magazine. 7 (75): 397—399. doi:10.1017/S0016756800209485.
White, E. I. (1938). New Pteraspids from South Wales. Quarterly Journal of the Geological Society. 94 (1–4): 85—116. doi:10.1144/GSL.JGS.1938.094.01-04.05.