@article{MM2_1989__63_3_155388,
     author = {Helmut Reckziegel and Martin Linden},
     title = {On the differentialbility of maps into lie transformation groups.},
     journal = {Manuscripta mathematica},
     pages = {377--380},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1989},
     zbl = {0672.57027},
     url = {http://geodesic.mathdoc.fr/item/MM2_1989__63_3_155388/}
}