So2001
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C.D. Sogge. Global existence for nonlinear wave equations with multiple speeds. Contemp. Math., 320 (2003), Harmonic analysis at Mount Holyoke (South Hadley, MA, 2001), 353--366. MathSciNet, arXiv.
C.D. Sogge. Global existence for nonlinear wave equations with multiple speeds. Contemp. Math., 320 (2003), Harmonic analysis at Mount Holyoke (South Hadley, MA, 2001), 353--366. MathSciNet, arXiv.