H I column densities of z > 2 swift gamma-ray bursts
Journal article published in 2006 by
A. de Ugarte Postigo,
P. M. Vreewijk,
Darach Watson,
P. Jakobsson,
K. Wiersema,
Johan Peter Uldall Fynbo 
,
C. Ledoux,
P. Vreeswijk,
D.~A A. Kann,
Jens Hjorth,
R.~S S. Priddey,
S. Klose,
N.~R R. Tanvir,
Jesper Olof Sollerman,
D. Reichart
and other authors.
,
C. Ledoux,
P. Vreeswijk,
D.~A A. Kann,
Jens Hjorth,
R.~S S. Priddey,
S. Klose,
N.~R R. Tanvir,
Jesper Olof Sollerman,
D. Reichart
and other authors.
