@article{1183530638,
author = {Wallen, Lawrence J.},
title = {Semigroups of partial isometries},
journal = {Bull. Amer. Math. Soc.},
volume = {75},
number = {5},
year = {1969},
pages = { 763-764},
language = {en},
url = {http://dml.mathdoc.fr/item/1183530638}
}
Wallen, Lawrence J. Semigroups of partial isometries. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 763-764. http://gdmltest.u-ga.fr/item/1183530638/