@article{05381051, title = {Boundary value problems for quasielliptic systems.}, journal = {Sibirskij Matematicheskij Zhurnal}, volume = {49}, year = {2008}, pages = {256-274}, zbl = {1164.35019}, language = {en}, url = {http://dml.mathdoc.fr/item/05381051} }
Bondar, L.N.; Demidenko, G.V. Boundary value problems for quasielliptic systems.. Sibirskij Matematicheskij Zhurnal, Tome 49 (2008) pp. 256-274. http://gdmltest.u-ga.fr/item/05381051/