@article{NUMA_1991__60_4_133600,
     author = {Mark Ainsworth and Alan Craig},
     title = {A posteriori error estimators in the finite element method.},
     journal = {Numerische Mathematik},
     pages = {429--464},
     publisher = {mathdoc},
     volume = {60},
     number = {4},
     year = {1991},
     zbl = {0757.65109},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133600/}
}