@article{JRAM_1993__440_153531,
     author = {Nathan Smale},
     title = {Geometric {P.D.E.'s} with isolated singularities.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--42},
     publisher = {mathdoc},
     volume = {440},
     year = {1993},
     zbl = {0776.58038},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1993__440_153531/}
}