@article{article3a1641de,
title   = {Artificial molecular quantum rings: spin density functional theory calculations},
author = {Castelano, L. K. and Hai, Guo-Qiang and Partoens, B. and Peeters, F. M.},
year = {2006},
doi = {10.1103/physrevb.74.045313},
journal   = {Physical Review B}
}