S. Archambault, F. Aubin, M. Auger, E. Behnke, B. Beltran, K. Clark, X. Dai, A. Davour, J. Farine, R. Faust et al.: Dark matter spin-dependent limits for WIMP interactions on F-19 by PICASSO. Physics Letters B 682(2), 185-192 (2009). doi:10.1016/j.physletb.2009.11.019