@article{IM_1991__106_1_143932,
     author = {Z.I. Szab\'o},
     title = {A short topological proof for the symmetry of 2 point homogeneous spaces.},
     journal = {Inventiones mathematicae},
     pages = {61--64},
     publisher = {mathdoc},
     volume = {106},
     number = {1},
     year = {1991},
     zbl = {0756.53024},
     url = {http://geodesic.mathdoc.fr/item/IM_1991__106_1_143932/}
}