An Inverse Problem of the Calculus of Variations for Multiple Integrals
1930 ◽
Vol 32
(3)
◽
pp. 509
◽
1930 ◽
Vol 32
(3)
◽
pp. 509-509
◽
1939 ◽
Vol 25
(12)
◽
pp. 631-637
◽
1982 ◽
Vol 5
(2)
◽
pp. 187-218
◽
2018 ◽
Vol 51
(18)
◽
pp. 185202
◽
1996 ◽
Vol 134
(3)
◽
pp. 249-274
◽