A.M.A.S.E.S. (Associazione per la Matematica Applicata alle Scienze Economiche e Sociali)

American Mathematical Society

CeNDEF (Center for Nonlinear Dynamics in Economics and Finance)

MADDMATHS

Resource Modeling Association

SCTPLS (Society for Chaos Theory in Psicology and Life Sciences)

SICC  (Italian Society for Chaos and Complexity)

The MacTutor History of Mathematics Archive of St. Andrew University

U.M.I. (Unione Matematica Italiana)