Ageev, A. A.; Gimadi, Eh. Kh.; Kurochkin, A. A. A polynomial algorithm for solving the facility location problem on a chain network with identical plant production capacities. (Russian) Zbl 1249.90295 Diskretn. Anal. Issled. Oper. 16, No. 5, 3-18 (2009). MSC: 90C35 90B80 PDFBibTeX XMLCite \textit{A. A. Ageev} et al., Diskretn. Anal. Issled. Oper. 16, No. 5, 3--18 (2009; Zbl 1249.90295)
Ageev, A. A.; Pyatkin, A. V. A 2-approximation algorithm for the metric 2-peripatetic salesman problem. (Russian) Zbl 1249.90296 Diskretn. Anal. Issled. Oper. 16, No. 4, 3-20 (2009). MSC: 90C35 PDFBibTeX XMLCite \textit{A. A. Ageev} and \textit{A. V. Pyatkin}, Diskretn. Anal. Issled. Oper. 16, No. 4, 3--20 (2009; Zbl 1249.90296)