@article{NUMA_1986__49_133120,
     author = {Harry Yserentant},
     title = {On the {Multi-Level} {Splitting} of {Finite} {Element} {Squares.}},
     journal = {Numerische Mathematik},
     pages = {379--412},
     publisher = {mathdoc},
     volume = {49},
     year = {1986},
     zbl = {0608.65065},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__49_133120/}
}