Validity of abundances derived from spaxel spectra of the MaNGA survey L. S. Pilyugin, E. K. Grebel, I. A. Zinchenko, Y. A. Nefedyev, V. M. Shulga, H. Wei and P.P. Berczik A&A, 613 (2018) A1 Published online: 15 May 2018 DOI: 10.1051/0004-6361/201732185