@article{articlea7f572fc,
title   = {Color dependence on thickness in topaz crystal from Brazil},
author = {Bonventi Junior, Waldemar and Isotani, Sadao and Albuquerque, Antonio Roberto Pereira Leite de},
year = {2012},
doi = {10.1155/2012/873804},
journal   = {Advances in Condensed Matter Physics}
}