@Article{JPDE-6-164, author = {Liu Yunkang, Wu Ciqian}, title = {Boundary Value Problems for Composite Type Systems of Second Order Partial Differential Equations}, journal = {Journal of Partial Differential Equations}, year = {1993}, volume = {6}, number = {2}, pages = {164--172}, abstract = { Doundary value problems for composite systems of partial differential equations are investigated in this paper. The uniqueness and existence of claasical solutions and generalized solutions are studied.}, issn = {2079-732X}, doi = {https://doi.org/}, url = {http://global-sci.org/intro/article_detail/jpde/5708.html} }