@article{701674,
     title = {On regularization of variational problems in first-order field theory},
     booktitle = {Proceedings of the 20th Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {2001},
     pages = {133-145},
     mrnumber = {MR1826686},
     zbl = {0979.35005},
     url = {http://dml.mathdoc.fr/item/701674}
}

Krupková, Olga; Smetanová, Dana. On regularization of variational problems in first-order field theory, dans Proceedings of the 20th Winter School "Geometry and Physics", GDML_Books,  (2001), pp. 133-145. http://gdmltest.u-ga.fr/item/701674/