@article{IM_1992__110_2_144044,
     author = {Atushi Matsuo},
     title = {Integrable connections related to zonal spherical functions.},
     journal = {Inventiones mathematicae},
     pages = {95--122},
     year = {1992},
     volume = {110},
     number = {2},
     zbl = {0801.35131},
     url = {http://geodesic.mathdoc.fr/item/IM_1992__110_2_144044/}
}