Normal forms of linear second order partial differential equations on the plane
2018 ◽
Vol 61
(11)
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pp. 1947-1962
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Keyword(s):
2015 ◽
Vol 53
(1)
◽
pp. 405-420
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2015 ◽
Vol 284
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pp. 807-834
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1961 ◽
Vol 14
(3)
◽
pp. 171-186
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1992 ◽
Vol 44
(3)
◽
pp. 371-375
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Keyword(s):
1973 ◽
Vol 13
(1)
◽
pp. 57-80
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1992 ◽
Vol 46
(1-2)
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pp. 63-75
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2016 ◽
pp. 165-183