Nobutaka Suzuki, Yuji Fukushima. Satisfiability of simple xpath fragments in the presence of dtds. In Chee Yong Chan, Prasenjit Mitra, editors, 11th ACM International Workshop on Web Information and Data Management (WIDM 2009), Hong Kong, China, November 2, 2008. pages 15-22, ACM, 2009. [doi]
Abstract is missing.