@article{CRMATH_2009__347_21-22_1309_0,
     author = {Hu, Xijun and Sun, Shanzhong},
     title = {Stability of relative equilibria and {Morse} index of central configurations},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {1309--1312},
     publisher = {Elsevier},
     volume = {347},
     number = {21-22},
     year = {2009},
     doi = {10.1016/j.crma.2009.09.023},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2009.09.023/}
}