@article{10_1007_s10492_009_0016_6,
     author = {Lin, Runchang and Zhang, Zhimin},
     title = {Numerical study of natural superconvergence in least-squares finite element methods for elliptic problems},
     journal = {Applications of Mathematics},
     pages = {251--266},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {2009},
     doi = {10.1007/s10492-009-0016-6},
     mrnumber = {2530542},
     zbl = {1212.65419},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-009-0016-6/}
}