Protostellar accretion in low mass metal poor stars and the cosmological lithium problem Emanuele Tognelli, Pier Giorgio Prada Moroni, Scilla Degl’Innocenti, Maurizio Salaris and Santi Cassisi A&A, 638 (2020) A81 Published online: 17 June 2020 DOI: 10.1051/0004-6361/201936723