On the Eigenvalues of Generalized Toeplitz Matrices. Palle Schmidt; Lars Mejlbo — 1962 Mathematica Scandinavica
The Toeplitz Matrices of an Arbitrary Laurent Polynomial. Palle Schmidt; Frank Spitzer — 1960 Mathematica Scandinavica
Determinants of a Certain Class of Non-Hermitian Toeplitz Matrices. Glenn Baxter; Palle Schmidt — 1961 Mathematica Scandinavica