The Euler derivative. An intrinsic approach to the calculus of variations.
Peetre, Jaak
Mathematica Scandinavica, Tome 43 (1978), p. 313-333 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1978-01-01
EUDML-ID : urn:eudml:doc:166595 
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     title = {The Euler derivative. An intrinsic approach to the calculus of variations.},
     journal = {Mathematica Scandinavica},
     volume = {43},
     year = {1978},
     pages = {313-333},
     zbl = {0404.58003},
     url = {http://dml.mathdoc.fr/item/GDZPPN00235506X}
}

Peetre, Jaak. The Euler derivative. An intrinsic approach to the calculus of variations.. Mathematica Scandinavica, Tome 43 (1978) pp. 313-333. http://gdmltest.u-ga.fr/item/GDZPPN00235506X/