PGP papers published in December 2011 include:

Angheluta L.,  Candela, T.,  Mathiesen, J.,  Renard, F. Effect of Surface Morphology on the Dissipation During Shear and Slip Along a Rock-Rock Interface that Contains a Visco-elastic Core, Pure and Appl. Geophysics, 168, 2335-2344
 
Japsen, P., Dysthe, D.K., Hartz, E.H.,  Stipp, S.L.S.,  Yarushina,V.,  Jamtveit, B. A compaction front in North Sea chalk. Journal of Geophysical Research, 116, B11208

Kobchenko, M., Panahi, H., Renard, F., Dysthe, D.K., Malthe-Sørenssen, A., Mazzini, A., Scheibert, J., Jamtveit, B., Meakin, P. Fracturing controlled primary migration of hydrocarbon fluids during heating of organic-rich shales. Journal of Geophysical Research, 116, B12201
Mair, K., Abe, S., Breaking Up: Comminution mechanisms in sheared simulated fault gauge. Pure and Appl. Geophysics, 168, 2277-2288