Franks, John M (October 1977). “Invariant sets of hyperbolic toral automorphisms”. American Journal of Mathematics (The Johns Hopkins University Press) 99 (5): 1089–1095. doi:10.2307/2374001. ISSN0002-9327.
jstor.org
Dyson, Freeman John; Falk, Harold (1992). “Period of a Discrete Cat Mapping”. The American Mathematical Monthly (Mathematical Association of America) 99 (7): 603–614. ISSN0002-9890. JSTOR2324989.
Franks, John M (October 1977). “Invariant sets of hyperbolic toral automorphisms”. American Journal of Mathematics (The Johns Hopkins University Press) 99 (5): 1089–1095. doi:10.2307/2374001. ISSN0002-9327.
Dyson, Freeman John; Falk, Harold (1992). “Period of a Discrete Cat Mapping”. The American Mathematical Monthly (Mathematical Association of America) 99 (7): 603–614. ISSN0002-9890. JSTOR2324989.