Thomas Young as reported in Brewster, David (1832). The Edinburgh Encyclopaedia. Vol. 12 (1st American ed.). Joseph and Edward Parker. Retrieved 2021-11-22.
Walter William Skeat, A Concise Etymological Dictionary of the English Language, "List of Doublets", p. 599ff (full text)
A.J. Woodman, "O MATRE PVLCHRA: The Logical Iambist: To the memory of Niall Rudd", The Classical Quarterly68:1:192-198 (May 2018) doi:10.1017/S0009838818000228, footnote 26
Eleanor Detreville, "An Overview of Latin Morphological Calques on Greek Technical Terms: Formation and Success", M.A. thesis, University of Georgia, 2015, full text