篇号 1<br>题名 Optimum Locations of Switching Centers and the Absolute Centers and Medians of a Graph<br>作者 S. L. Hakimi<br>杂志全称 Operations Research<br>年份\卷\期 Vol. 12, No. 3 (May - Jun., 1964),<br>页数  pp. 450-459<br>电子链接 <a href="http://links.jstor.org/sici?sici=0030-364X" target="_blank" >http://links.jstor.org/sici?sici=0030-364X</a>(196405%2F06)12%3A3%3C450%3AOLOSCA%3E2.0.CO%3B2-M

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