@article{article7e279887,
title   = {A galactic ring of minimum stellar density near the solar orbit radius},
author = {Barros, D. A and Lépine, Jacques Raymond Daniel and Junqueira, T. C},
year = {2013},
doi = {10.1093/mnras/stt1454},
journal   = {Monthly Notices of the Royal Astronomical Society}
}