Article ISI
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY  (2014)

Helium enhanced stars and multiple populations along the horizontal branch of NGC 2808: direct spectroscopic measurements

Marino, AF; Milone, AP; Przybilla N.; Bergemann, M; Lind, K; Asplund, M; Cassisi S.; Catelan, M; Casagrande, L; Valcarce, AAR; Bedin, LR; Cortes, C; D'Antona F.; Jerjen, H; Piotto, G; Schlesinger, K; Zoccali, M; Angeloni R.