@article{JRAM_1990__407_153227,
     author = {H. Reckziegel and Th. Meumertzheim},
     title = {Strips with parallel second fundamental form in {pseudo-Riemannian} manifolds.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {19--32},
     publisher = {mathdoc},
     volume = {407},
     year = {1990},
     zbl = {0692.53006},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1990__407_153227/}
}