Clifford A. Pickover: A Passion for Mathematics: Numbers, Puzzles, Madness, Religion, and the Quest for Reality. Wiley, 2011, ISBN9781118046074, S. 33 (excerpt, p. 33, at Google Books)
López de Prado, Marcos (2016). "Mathematics and Economics: A reality check". The Journal of Portfolio Management. 43 (1): 5–8. doi:10.3905/jpm.2016.43.1.005. S2CID219231926.
Chayes, L.; D. McKellar; B. Winn (November 13, 1998). "Percolation and Gibbs states multiplicity for ferromagnetic Ashkin-Teller models on z2". Journal of Physics A: Mathematical and General. 31 (45): 9055. Bibcode:1998JPhA...31.9055C. doi:10.1088/0305-4470/31/45/005. ISSN0305-4470.
Chayes, L.; D. McKellar; B. Winn (November 13, 1998). "Percolation and Gibbs states multiplicity for ferromagnetic Ashkin-Teller models on z2". Journal of Physics A: Mathematical and General. 31 (45): 9055. Bibcode:1998JPhA...31.9055C. doi:10.1088/0305-4470/31/45/005. ISSN0305-4470.
López de Prado, Marcos (2016). "Mathematics and Economics: A reality check". The Journal of Portfolio Management. 43 (1): 5–8. doi:10.3905/jpm.2016.43.1.005. S2CID219231926.
Chayes, L.; D. McKellar; B. Winn (November 13, 1998). "Percolation and Gibbs states multiplicity for ferromagnetic Ashkin-Teller models on z2". Journal of Physics A: Mathematical and General. 31 (45): 9055. Bibcode:1998JPhA...31.9055C. doi:10.1088/0305-4470/31/45/005. ISSN0305-4470.