@article{NUMA_1986__48_133089,
     author = {J.T. Marti and M. Hegland},
     title = {Numerical {Computation} of {Least} {Constants} for the {Sobolev} {Inequality.}},
     journal = {Numerische Mathematik},
     pages = {607--616},
     year = {1986},
     volume = {48},
     zbl = {0626.46025},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__48_133089/}
}