Method of characteristics and first integrals for systems of quasi-linear partial differential equations of first order
2014 ◽
Vol 58
(8)
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pp. 1665-1676
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1994 ◽
Vol 2
(1)
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1958 ◽
Vol 10
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pp. 127-160
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2015 ◽
pp. 1-47
1917 ◽
Vol s2-16
(1)
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pp. 219-272
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2013 ◽
pp. 379-404
1981 ◽
Vol 128
(1)
◽
pp. 325-340
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