@article{CMH_1977__52_139716,
     author = {Wolfgang Ziller},
     title = {The {Jacobi} equation on naturally reductive compact {Riemannian} homogeneous spaces.},
     journal = {Commentarii mathematici Helvetici},
     pages = {573--590},
     publisher = {mathdoc},
     volume = {52},
     year = {1977},
     zbl = {0368.53033},
     url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139716/}
}