PEIRCE, Charles Sanders. The essential Peirce : selected philosophical writings. Volume 1, (1867-1893). Bloomington [u.a.] : Indiana University Press, 1992. xli, 399 s. Dostupné na internetu: <http://www.zentralblatt-math.org/zmath/en/search/?an=0937.01014> ISBN 978-0-253-20721-0.