@article{GDZPPN002225182,
title = {On the obstacle problem with a volume constraint.},
journal = {Manuscripta mathematica},
volume = {43},
year = {1983},
pages = {73-84},
zbl = {0524.49005},
url = {http://dml.mathdoc.fr/item/GDZPPN002225182}
}
Eisen, Goswin. On the obstacle problem with a volume constraint.. Manuscripta mathematica, Tome 43 (1983) pp. 73-84. http://gdmltest.u-ga.fr/item/GDZPPN002225182/