Unsolved Problems in the Theory of Non-Linear Wave Equations
1978 ◽
pp. 147-162
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1976 ◽
pp. 438-451
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2015 ◽
Vol 2016
(11)
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pp. 3279-3355
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2000 ◽
Vol 191
(10)
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pp. 1541-1559
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1993 ◽
Vol 16
(2)
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pp. 131-149
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1986 ◽
Vol 110
(1)
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pp. 41-57
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2012 ◽
Vol 36
(8)
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pp. 1183-1188
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