LtZh1995
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T. Li, Y. Zhou, A note on the life-span of classical solutions to nonlinear wave equations in four space dimensions, Indiana U. Math. J. 44 (1995), 1207-1248.
T. Li, Y. Zhou, A note on the life-span of classical solutions to nonlinear wave equations in four space dimensions, Indiana U. Math. J. 44 (1995), 1207-1248.