The extent of mixing in stellar interiors: the open clusters Collinder 261 and Melotte 66Arnas Drazdauskas, Gražina Tautvaišienė, Sofia Randich, Angela Bragaglia, Šarūnas Mikolaitis and Rimvydas JanulisA&A, 589 (2016) A50DOI: https://doi.org/10.1051/0004-6361/201628138
