Scaling behavior in economics: empirical results and modeling of company growth

Buldyrev, SV, Leschhorn, H, Maass, P, Stanley, HE, Stanley, MHR, Amaral, LAN, Havlin, S, Salinger, MA
P. Int. Sch. Phys. Enrico. Fermi 134,  145 - 174 (1997)