Mitchell, A. G., ‘Miscellaneous Notes: A Newly-Discovered Manuscript of the C-Text of "Piers Plowman"’, in Modern Language Review, 36.2 (1941), pp. 243–44, doi:10.2307/3716672

Mitchell, A. G., review of E. Talbot Donaldson, Piers Plowman. The C-Text and Its Poet, in Modern Language Review, 45.3 (1950), pp. 368–69, doi:10.2307/3718518