@article{ZNSL_1981_111_a9,
     author = {S. G. Mikhlin},
     title = {Error of the {Bubnov{\textendash}Galerkin} method for elliptic boundary-value problems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {137--144},
     year = {1981},
     volume = {111},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1981_111_a9/}
}