Relevant traits, genetic variation and breeding strategies in early silage maize Y. Barrière, O. Argillier, B. Michalet-Doreau, Y. Hébert, E. Guingo, C. Giauffret and J.C. Émile Agronomie, 17 8 (1997) 395-411 DOI: 10.1051/agro:19970804