Conley, Charles C.; Smoller, Joel A. Topological methods in the theory of shock waves. (English) Zbl 0267.35059 Partial diff. Equ., Berkeley 1971, Proc. Sympos. Pure Math. 23, 293-302 (1973). MSC: 35F25 35L65 35L60 76L05 PDFBibTeX XML
Conley, C. An oscillation theorem for linear systems with more than one degree of freedom. (English) Zbl 0243.34086 Conf. Theory ordinary partial diff. Equ., Dundee/Scotland 1972, Lect. Notes Math. 280, 232-235 (1972). MSC: 34C25 37-XX PDFBibTeX XML