@article{1077490342,
author = {Williamson, John},
title = {Quasi-unitary matrices},
journal = {Duke Math. J.},
volume = {3},
number = {1},
year = {1937},
pages = { 715-725},
language = {en},
url = {http://dml.mathdoc.fr/item/1077490342}
}
Williamson, John. Quasi-unitary matrices. Duke Math. J., Volume 3 (1937) no. 1, pp. 715-725. http://gdmltest.u-ga.fr/item/1077490342/