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@article{MS2_1982__51_166822, author = {Torbj\"orn Kolsrud}, title = {A uniqueness theorem for higher order elliptic partial differential equations.}, journal = {Mathematica Scandinavica}, pages = {323--332}, publisher = {mathdoc}, volume = {51}, year = {1982}, zbl = {0491.35045}, url = {http://geodesic.mathdoc.fr/item/MS2_1982__51_166822/} }
Torbjörn Kolsrud. A uniqueness theorem for higher order elliptic partial differential equations.. Mathematica Scandinavica, Tome 51 (1982), pp. 323-332. http://geodesic.mathdoc.fr/item/MS2_1982__51_166822/