Approach to complexity in veterinary epidemiology : example of cattle reproductionChristian Ducrot, Jean-Marie Legay, Yrjö Tapio Gröhn, Carsten Enevoldsen and Didier CalavasNat. Sci. Soc., 4 1 (1996) 23-34DOI: https://doi.org/10.1051/nss/19960401023
