Karen da Silva Figueiredo Viviane Torres da Silva Christiano de O. Braga Modeling Norms in Multi-agent Systems with NormML. 39-57 2010 COIN@AAMAS&MALLOW http://dx.doi.org/10.1007/978-3-642-21268-0_3 conf/atal/2010coin db/conf/atal/coin2010.html#FigueiredoSB10