MR0915268 Nakao, Mitsuhiro and Kuwahara, Hiroto Mitsuhiro NAKAO and Hiroto KUWAHARA Decay estimates for some semilinear wave equations with degenerate dissipative terms Funkcialaj Ekvacioj. Serio Internacia 30 1987 135--145 http://fe.math.kobe-u.ac.jp/FE/Free/vol30/fe30-1-13.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE21-30-en_KML/fe30-135-145/fe30-135-145.pdf http://www.ams.org/mathscinet-getitem?mr=MR0915268 fe30-135-145 1987 Decay Estimates for Some Semilinear Wave Equations with Degenerate Dissipative Terms NAKAO, Mitsuhiro; KUWAHARA, Hiroto NAKAO, Mitsuhiro; KUWAHARA, Hiroto
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