@article{article5668b46a,
title   = {Influence of the number of atoms in a ring-shaped magneto-optical trap: observation of bifurcation},
author = {Felinto, Daniel and Marcassa, Luís Gustavo and Bagnato, Vanderlei Salvador and Vianna, S S},
year = {1999},
doi = {10.1103/physreva.60.2591},
journal   = {Physical Review A}
}