A Linear Time Algorithm to Recognize the Double Euler Trail for Series-Parallel Networks. - Lih-Hsing Hsu; Jeng-Yan Hwang; Tung-Yang Ho; Chang-Hsiung Tsai (ISA, 1991)

Data Structure for Graph Representations of a Network Having Double Euler Trails. - Ting-Yi Sung; Lih-Hsing Hsu; Jeng-Yan Hwang (IFIP Congress (1), 1992)

The Recognition of Double Euler Trails in Series-Parallel Networks. - Tung-Yang Ho; Ting-Yi Sung; Lih-Hsing Hsu; Chang-Hsiung Tsai; Jeng-Yan Hwang (J. Algorithms, 1998)