@article{ETNA_1997__6__a14,
     author = {Chen,  Zhangxin},
     title = {The analysis of intergrid transfer operators and multigrid methods for nonconforming finite elements},
     journal = {Electronic transactions on numerical analysis},
     pages = {78--96},
     year = {1997},
     volume = {6},
     zbl = {0890.65126},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_1997__6__a14/}
}