Bai, Chun-song; Kang, Li-ying The pos/neg-weighted 2-medians in balanced trees with subtree-shaped customers. (English) Zbl 1359.90054 Acta Math. Appl. Sin., Engl. Ser. 32, No. 4, 891-898 (2016). MSC: 90B80 90C39 PDFBibTeX XMLCite \textit{C.-s. Bai} and \textit{L.-y. Kang}, Acta Math. Appl. Sin., Engl. Ser. 32, No. 4, 891--898 (2016; Zbl 1359.90054) Full Text: DOI
Cheng, Yu-kun; Kang, Li-ying; Yan, Hong The backup 2-median problem on block graphs. (English) Zbl 1305.90248 Acta Math. Appl. Sin., Engl. Ser. 30, No. 2, 309-320 (2014). MSC: 90B80 PDFBibTeX XMLCite \textit{Y.-k. Cheng} et al., Acta Math. Appl. Sin., Engl. Ser. 30, No. 2, 309--320 (2014; Zbl 1305.90248) Full Text: DOI