Principal currents for a pair of unitary operators/
Joel D. Pincus, Shaojie Zhou.
- Providence, R.I.: American Mathematical Society, 1994.
- vi, 103 p.: ill.; 26 cm.
- Memoirs of the American Mathematical Society; no. 522. .
"May 1994, volume 109, number 522 (second of 5 numbers)".