TY  - DATA
AU  - Dritschel, Michael A.
AU  - Woerdeman, Hugo J.
TI  - Model theory and linear extreme points in the numerical radius unit ball 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470402006 (online)
PY  - 1997///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0615
ER  -