PEIRCE, Charles Sanders. The essential Peirce : selected philosophical writings. Volume 2, (1893-1913). Bloomington [u.a.] : Indiana University Press, 1998. xxxviii, 584 s. Dostupné na internetu: <http://www.zentralblatt-math.org/zmath/en/search/?an=0931.01035> ISBN 978-0-253-21190-3.