Some may be interested in the following paper that is currently in press with the
International Journal of Astrobiology:
The sulphur dilemma: are there biosignatures on Europa's icy and patchy surface?J. Chela-Flores
International Journal of Astrobiology, Forthcoming article.
doi: 10.1017/S1473550406002862, Published online by Cambridge University Press 04 Jul 2006.
Fortunately, for those without access to IJA, a
251 Kb PDF preprint is available.