@article{JRAM_1981__325_152359,
     author = {Helmut Reckziegel},
     title = {On the problem whether the image of a given differentiable map into {Riemannian} manifold is contained in a submanifold with parallel second fundamental form.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {87--104},
     publisher = {mathdoc},
     volume = {325},
     year = {1981},
     zbl = {0449.53045},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1981__325_152359/}
}