PAPERS:
Michigan
Math J. 52 (2004), (3) 603--618.
Proc. Amer. Math.
Soc. 132 (2004), (7) 2121-2125.
Illinois J.
Math. 47 (2003), (4) 1063-1078.
Canad. J. Math. 55 (2003), (2) 225-246.
Linear
Algebra Appl.
362 (2003), 275-286.
Indiana
Univ. Math. J. 50 (2001), (4) 1675-1689.
Studia Math. 137 (1999), (3) 203-260.
C. R. Acad. Sci.
Paris S\'er. I Math.
326 (1998), 845-850.
Proc.
Edinburgh Math. Soc. 41 (1998), 93-116.
Publications
math\'ematiques de l'Universit\'e Pierre et Marie Curie, S\'eminaire d'Initiation \`a
l'Analyse,
118
(1995/96).