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@article{MZ_1992__209_2_174363, author = {Guido Sweers}, title = {Strong positivity in {C} (...) for elliptic systems.}, journal = {Mathematische Zeitschrift}, pages = {251--272}, publisher = {mathdoc}, volume = {209}, number = {2}, year = {1992}, zbl = {0727.35045}, url = {http://geodesic.mathdoc.fr/item/MZ_1992__209_2_174363/} }
Guido Sweers. Strong positivity in C (...) for elliptic systems.. Mathematische Zeitschrift, Tome 209 (1992) no. 2, pp. 251-272. http://geodesic.mathdoc.fr/item/MZ_1992__209_2_174363/