1. Burbidge 1981: John W. Burbidge, Peirce on Historical Explanation, in L. W. Sumner et al. (eds.), Pragmatism and Purpose, University of Toronto Press, Toronto 1981, pp. 15-27.
2. Colapietro 2003: Vincent Colapietro, The Space of Signs, in Dale Jacquette (ed.), Philosophy, Psychology, and Psychologism, Kluwer, New York 2003.
3. Darwin 1969: Charles Darwin, The Autobiography of Charles Darwin and Selected Letters, Dover Publications, New York 1969.
4. Esposito 1983: Joseph L. Esposito, Peirce and the Philosophy of History, , 192 (1983), pp. 55-65.
5. Grünbaum 1967: Adolf Grünbaum, The Status of Temporal Becoming, in Richard Gale (ed.), The Philosophy of Time, Anchor Books, Garden City (NY) 1967.