Cartesian currents in the calculus of variations
Journées équations aux dérivées partielles (1997), article no. 8, 8 p. 
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     author = {Giaquinta, M.},
     title = {Cartesian currents in the calculus of variations},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {8},
     pages = {1--8},
     publisher = {Ecole polytechnique},
     year = {1997},
     mrnumber = {1482275},
     language = {en},
     url = {http://www.numdam.org/item/JEDP_1997____A8_0/}
}
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Giaquinta, M. Cartesian currents in the calculus of variations. Journées équations aux dérivées partielles (1997), article  no. 8, 8 p. http://www.numdam.org/item/JEDP_1997____A8_0/