@article{NUMA_1987__51_133197,
     author = {U. Banerjee},
     title = {Lower {Norm} {Estimates} for {Approximate} {Solutions} of {Differential} {Equations} with {Non-Smooth} {Coefficients.}},
     journal = {Numerische Mathematik},
     pages = {303--322},
     publisher = {mathdoc},
     volume = {51},
     year = {1987},
     zbl = {0613.65087},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1987__51_133197/}
}