Samuel Mascarenhas João Dias Rui Prada Ana Paiva One for All or One for One? The Influence of Cultural Dimensions in Virtual Agents' Behaviour. 272-286 2009 IVA http://dx.doi.org/10.1007/978-3-642-04380-2_30 conf/iva/2009 db/conf/iva/iva2009.html#MascarenhasDPP09