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by Li, Deren; Shan, Jie; Gong, Jianya
by Li, Deren; Wang, Shuliang; Li, Deyi
by Deren Li; Shuliang Wang; Deyi Li
by Li, Deren; Gong, Jianya; Wu, Huayi
by Deren Li; ?Jie Shan; ?Jianya Gong