@article{JRAM_1881__90_148463,
     author = {Thomas Craig},
     title = {Distortion of an elastic sphere.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {253--266},
     publisher = {mathdoc},
     volume = {90},
     year = {1881},
     zbl = {13.0736.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1881__90_148463/}
}