@article{article7e37445d,
title   = {Double-ring structure: another variant in the spatial distribution of cold sodium atoms},
author = {Araujo, M T and Marcassa, Luís Gustavo and Zílio, Sérgio Carlos and Bagnato, Vanderlei Salvador},
year = {1995},
doi = {10.1103/physreva.51.4286},
journal   = {Physical Review A}
}