Peng Zhang Dawei Song Xiaozhao Zhao Yuexian Hou Investigating Query-Drift Problem from a Novel Perspective of Photon Polarization. 332-336 2011 ICTIR http://dx.doi.org/10.1007/978-3-642-23318-0_33 conf/ictir/2011 db/conf/ictir/ictir2011.html#ZhangSZH11