Wide field spectrograph concepts for the European extremely large telescope - art. no. 62692G ανά Moretto, G, Bacon, R, Cuby, J, Hammer, F, Amram, P, Blais-Ouellette, S, Blanc, P, Devriendt, J, Epinat, B, Fusco, T, Jagourel, P, Hernandez, O, Kneib, J, Montilla, I, Neichel, B, Pecontal, E, Prieto, E, Puech, M