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Chi-Wing Wong, Raymond, Wai-chee Fu, Jian Pei, Yip Sing Ho, Tai Wong, Yubao Liu, and Yubao others. “Efficient Skyline Querying with Variable User Preferences on Nominal Attributes.” ArXiv E-Prints, 2007, arXiv-0710.

Chi-Wing Wong R, Fu W-C, Pei J, Ho YS, Wong T, Liu Y, et al. Efficient Skyline Querying with Variable User Preferences on Nominal Attributes. arXiv e-prints. 2007;arXiv-0710.

Chi-Wing Wong, Raymond, et al. “Efficient Skyline Querying with Variable User Preferences on Nominal Attributes.” ArXiv E-Prints, 2007, p. arXiv-0710.

Chi-Wing Wong R, Fu W-C, Pei J, Ho YS, Wong T, Liu Y, others. Efficient Skyline Querying with Variable User Preferences on Nominal Attributes. arXiv e-prints. 2007;arXiv-0710.