@article{GDZPPN00235733X,
title = {A uniqueness theorem for higher order elliptic partial differential equations.},
journal = {Mathematica Scandinavica},
volume = {50},
year = {1982},
pages = {323-332},
zbl = {0491.35045},
url = {http://dml.mathdoc.fr/item/GDZPPN00235733X}
}
Kolsrud, Torbjörn. A uniqueness theorem for higher order elliptic partial differential equations.. Mathematica Scandinavica, Tome 50 (1982) pp. 323-332. http://gdmltest.u-ga.fr/item/GDZPPN00235733X/