On symmetries, conservation laws, and variational problems for partial differential equations
1994 ◽
Vol 35
(4)
◽
pp. 1998-2012
◽
2006 ◽
pp. 381-397
◽
2010 ◽
Vol 53
(4)
◽
pp. 693-697
◽
2018 ◽
Vol 131
◽
pp. 89-100
◽
2020 ◽
Vol 91
◽
pp. 105349
2005 ◽
Vol 106
(1)
◽
pp. 278-299
◽
1963 ◽
Vol 27
(2)
◽
pp. 378-391
◽
2002 ◽
Vol 13
(5)
◽
pp. 567-585
◽
2003 ◽
Vol 15
(1)
◽
pp. 1-13
◽