Gonzalez, Diego L.; Piro, Oreste (1983-03-21). "Chaos in a Nonlinear Driven Oscillator with Exact Solution". Physical Review Letters. 50 (12). American Physical Society (APS): 870–872. doi:10.1103/physrevlett.50.870. ISSN0031-9007.
Feingold, Mario; Kadanoff, Leo P.; Piro, Oreste (1988). "Passive scalars, three-dimensional volume-preserving maps, and chaos". Journal of Statistical Physics. 50 (3–4). Springer Science and Business Media LLC: 529–565. doi:10.1007/bf01026490. ISSN0022-4715. S2CID120852538.
Gonzalez, Diego L.; Piro, Oreste (1983-03-21). "Chaos in a Nonlinear Driven Oscillator with Exact Solution". Physical Review Letters. 50 (12). American Physical Society (APS): 870–872. doi:10.1103/physrevlett.50.870. ISSN0031-9007.
Feingold, Mario; Kadanoff, Leo P.; Piro, Oreste (1988). "Passive scalars, three-dimensional volume-preserving maps, and chaos". Journal of Statistical Physics. 50 (3–4). Springer Science and Business Media LLC: 529–565. doi:10.1007/bf01026490. ISSN0022-4715. S2CID120852538.