@Stateless(name="ConteudoFacade")
@Remote(ConteudoFacadeRemote.class)
public class ConteudoFacade implements ConteudoFacadeRemote {
    @PersistenceContext(unitName = "Teste-ejbPU")
    private EntityManager em;

/******************************************************/
//web.xml
<ejb-ref>
    <ejb-ref-name>ConteudoFacade</ejb-ref-name>
    <ejb-ref-type>Session</ejb-ref-type>
    <remote>tibox.negocio.ConteudoFacadeRemote</remote>
    <ejb-link>ConteudoFacade</ejb-link>
</ejb-ref>

/******************************************************/
//using on managed bean
@EJB(name="ConteudoFacade")
    private ConteudoFacadeRemote conteudoFacadeBean;

public String getConteudo(){
    conteudoFacadeBean = new ConteudoFacade();
    Conteudo conteudo = conteudoFacadeBean.getConteudoByPk(new Long(1), new Long(1991));