@article{NUMA_1982__40_132833,
     author = {I. Babuska and M. Bieterman},
     title = {The {Finite} {Element} {Method} for {Parabolic} {Equations.} {I.} {A} {Posteriori} {Error} {Estimation}},
     journal = {Numerische Mathematik},
     pages = {339--372},
     publisher = {mathdoc},
     volume = {40},
     year = {1982},
     zbl = {0534.65072},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1982__40_132833/}
}