Tramontana, FabioFabioTramontanaGardini, LauraLauraGardiniDieci, RobertoRobertoDieciWesterhoff, Frank H.Frank H.Westerhoff0000-0003-1666-41032021-12-232021-12-2320091026-0226https://fis.uni-bamberg.de/handle/uniba/52582engThe Emergence of "bull and bear" dynamics in a nonlinear model of interacting marketsarticle10.1155/2009/310471