Gemini-GRACES high-quality spectra of Kepler evolved stars with transiting planets - I. Detailed characterization of multi-planet systems Kepler-278 and Kepler-391
E. Jofré, J. M. Almenara, R. Petrucci, R. F. Díaz, Y. Gómez Maqueo Chew, E. Martioli, I. Ramírez, L. García, C. Saffe, E. F. Canul, A. Buccino, M. Gómez and E. Moreno Hilario
