| Title | A non-commutative Positivstellensatz on isometries |
| Publication Type | Journal Article |
| Year of Publication | 2004 |
| Authors | Helton JW, Putinar M, McCullough SA |
| Journal | JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK |
| Volume | 568 |
| Pagination | 71-80 |
| Date Published | MAR |