Molecular complexity in pre-stellar cores: a 3 mm-band study of L183 and L1544 Valerio Lattanzi, Luca Bizzocchi, Anton I. Vasyunin, Jorma Harju, Barbara M. Giuliano, Charlotte Vastel and Paola Caselli A&A, 633 (2020) A118 Published online: 22 January 2020 DOI: 10.1051/0004-6361/201936884