The Hamburg/ESO R-process Enhanced Star survey (HERES) - X. HE 2252−4225, one more r-process enhanced and actinide-boost halo starL. Mashonkina, N. Christlieb and K. ErikssonA&A, 569 (2014) A43DOI: https://doi.org/10.1051/0004-6361/201424017