@Article{zbMATH04048113,
Author = {Gerhard {Freiling}},
Title = {{General boundary eigenvalue problems for systems of differential equations with multiple roots of the characteristic equation.}},
FJournal = {{Proceedings of the Royal Society of Edinburgh. Section A. Mathematics}},
Journal = {{Proc. R. Soc. Edinb., Sect. A, Math.}},
ISSN = {0308-2105; 1473-7124/e},
Volume = {108},
Number = {1-2},
Pages = {45--56},
Year = {1988},
Publisher = {Cambridge University Press, Cambridge; RSE Scotland Foundation, Edinburgh},
Language = {English},
MSC2010 = {34L99},
Zbl = {0643.34022}
}