XPEEM valence state imaging of mineral micro-intergrowths with a spatial resolution of 100 nm A.D. Smith, P.F. Schofield, A. Scholl, R.A.D. Pattrick et J.C. Bridges J. Phys. IV France, 104 (2003) 373-376 DOI: 10.1051/jp4:20030102