The ubiquitous nature of the horizontal branch second U-jump - A link with the Blue Hook scenario?Y. Momany, L. R. Bedin, S. Cassisi, G. Piotto, S. Ortolani, A. Recio-Blanco, F. De Angeli and F. CastelliA&A, 420 2 (2004) 605-617DOI: https://doi.org/10.1051/0004-6361:20035699
