1. Green's function for ordinary differential operators;Benzinger;J. Differential Equations,1970
2. Completeness of eigenvectors in Banach spaces;Benzinger,1973
3. The Lp behavior of eigenfunction expansions;Benzinger;Trans. Amer. Math. Soc.,1972
4. Pointwise and norm convergence of a class of biorthogonal expansions;Benzinger;Trans. Amer. Math. Soc.,1977
5. A canonical form for a class of ordinary differential operators;Benzinger,1977