@article{MZ_1995__220_1_174814,
     author = {R. Tribuzy and J.-H. Eschenburg},
     title = {(1,1)-geodesic maps into {Grassmann} manifolds.},
     journal = {Mathematische Zeitschrift},
     pages = {337--346},
     year = {1995},
     volume = {220},
     number = {1},
     zbl = {0863.53046},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174814/}
}