@article{NUMA_1986__49_133104,
     author = {J. Hertling and R. Frank and H. Lehner},
     title = {B-Convergence {Properties} of {Defect} {Correction} {Methods.} {I.}},
     journal = {Numerische Mathematik},
     pages = {139--162},
     publisher = {mathdoc},
     volume = {49},
     year = {1986},
     zbl = {0619.65061},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__49_133104/}
}