Field-induced valence transition in EuPtP1−xAsx A. Mitsuda, T. Okuma, M. Sugishima, H. Wada, K. Sato and K. Kindo Eur. Phys. J. B, 85 2 (2012) 71 Published online: 20 February 2012 DOI: 10.1140/epjb/e2011-20807-4