@article{1102868243,
author = {Piech, M. Ann},
title = {Locality of the number of particles operator.},
journal = {Pacific J. Math.},
volume = {61},
number = {2},
year = {1975},
pages = { 259-262},
language = {en},
url = {http://dml.mathdoc.fr/item/1102868243}
}
Piech, M. Ann. Locality of the number of particles operator.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 259-262. http://gdmltest.u-ga.fr/item/1102868243/