Bin Cui Heng Tao Shen Jialie Shen Kian-Lee Tan Exploring Bit-Difference for Approximate KNN Search in High-dimensional Databases. 165-174 2005 conf/adc/2005 ADC http://crpit.com/confpapers/CRPITV39Cui.pdf db/conf/adc/adc2005.html#CuiSST05