8Maurice Leven.Ent repreneurial and Property In-come and Income from Miscellaneous Sources[M].Incomein the Various States:its Sources and Distribution,1925:221-249.
9Robert J.Lampman,The share of top wealth-holde-rs in national wealth,1922-56[M].Princeton UniversityPress,1962.
10Bruun.C.Endogenous Growth in a Swarm Economy:Fight Time,Space and Complexity in F.Luna and B.Ste-fansson,Economic Simulations in Swarm:Agent-BasedModelling and Object Oriented Programming,Kluwer Aca-demic Press,2000.