Citation: C. Tretter, Boundary eigenvalue problems for differential equations N eta = lambda P eta with lambda-polynomial boundary conditions, J DIFF EQUA, 170(2), 2001, pp. 408-471
Citation: R. Mennicken et al., Direct and inverse spectral problem for a system of differential equationsdepending rationally on the spectral parameter, DUKE MATH J, 109(3), 2001, pp. 413-449
Citation: C. Tretter, Spectral problems for systems of differential equations y '+A(0)y = lambdaA(1)y with lambda-polynomial boundary conditions, MATH NACHR, 214, 2000, pp. 129-172