@inproceedings{a.1996duality,
title={Duality and singular continuous spectrum in the almost Mathieu equation},
author={A. Y. Gordon, S. Jitomirskaya, Y. Last, and B. Simon},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203328946058545},
booktitle={Acta Mathematica},
volume={178},
number={2},
pages={169-183},
year={1996},
}
A. Y. Gordon, S. Jitomirskaya, Y. Last, and B. Simon. Duality and singular continuous spectrum in the almost Mathieu equation. 1996. Vol. 178. In Acta Mathematica. pp.169-183. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203328946058545.