*Adams, William; Shanks, Daniel (1982). “Strong primality tests that are not sufficient”. Mathematics of Computation39 (159): 255–300. doi:10.2307/2007637. MR0658231.
*Füredi, Z. (1987). “The number of maximal independent sets in connected graphs”. Journal of Graph Theory11 (4): 463–470. doi:10.1002/jgt.3190110403.
*Lucas, E. (1878). “Théorie des fonctions numériques simplement périodiques”. American Journal of Mathematics1: 197–240. doi:10.2307/2369311.
*Adams, William; Shanks, Daniel (1982). “Strong primality tests that are not sufficient”. Mathematics of Computation39 (159): 255–300. doi:10.2307/2007637. MR0658231.