Ulrich Oberst:
Variations on the Fundamental Principle for Linear Systems of Partial Differential and Difference Equations with Constant Coefficients.
211-243 Electronic Edition (Springer LINK) BibTeX
Kazuo Murota:
Combinatorial Relaxation Algorithm for the Maximum Degree of Subdeterminants: Computing Smith-McMillan Form at Infinity and Structural Indeces in Kronecker Form.
251-273 Electronic Edition (Springer LINK) BibTeX