@article{ZNSL_2008_362_a1,
     author = {A. Arkhipova},
     title = {Variational problem with an obstacle in $\mathbb R^N$ for a~class of quadratic functionals},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {15--47},
     publisher = {mathdoc},
     volume = {362},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2008_362_a1/}
}