@article{JRAM_1984__350_152639,
     author = {V. Ancona and Vo Van Tan},
     title = {On the blowing down problem in {C-analytic} geometry.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {178--182},
     publisher = {mathdoc},
     volume = {350},
     year = {1984},
     zbl = {0527.32015},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1984__350_152639/}
}