Improving dark energy constraints with high-redshift Type Ia supernovae from CANDELS and CLASH Vincenzo Salzano, Steven A. Rodney, Irene Sendra, Ruth Lazkoz, Adam G. Riess, Marc Postman, Tom Broadhurst and Dan Coe A&A, 557 (2013) A64 Published online: 29 August 2013 DOI: 10.1051/0004-6361/201321738