Samuel Taylor Coleridge (1858). “The complete works of Samuel Taylor Coleridge: With an introductory essay upon his philosophical and theological opinions”, p.230
To Hannah More, who had expressed a wonder that the poet who had written 'Paradise Lost' should write such poor Sonnets, in James Boswell 'The Life of Samuel Johnson' (1791) vol. 4, p. 305 (13 June 1784)
Robert Solow on Milton Friedman's ideas and his own, in a series of papers at a 1966 conference, also published in "Price Controls" by Hugh Rockoff, 1992.