Liwei Wang Henning Köhler Ke Deng Xiaofang Zhou Shazia Wasim Sadiq Providing Flexible Tradeoff for Provenance Tracking. 226-240 2010 WISE Workshops http://dx.doi.org/10.1007/978-3-642-24396-7_18 conf/wise/2010-w db/conf/wise/wise2010w.html#WangKDZS10