@article{ZNSL_1997_247_a7,
     author = {L. G. Labsker},
     title = {Test closure operations in {a~Banach} space that are generated by linear functionals},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {114--145},
     publisher = {mathdoc},
     volume = {247},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_247_a7/}
}