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Sunspots and cycles : the Poincaré-Hopf approach

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Bibliographic reference Chiappori, P.-A. ; Davila Muro, Julio. Sunspots and cycles : the Poincaré-Hopf approach. In: Journal of Mathematical Economics, Vol. 26, p. 269-284 (1996)
Permanent URL http://hdl.handle.net/2078.1/116663