public void muestra() 
    {
        System.out.println(fuente.getName());
        System.out.println("Elementos: "+elementos.size());
        System.out.println("Nodos: "+nodos.size()+"\n");
        Iterator iterator = elementos.entrySet().iterator();
        double min=100,max=0;
        while(iterator.hasNext())
        {
            Map.Entry next = (Map.Entry) iterator.next();
            Object value = next.getValue();
            double valor = ((Elemento)value).valor();
            min = (min > valor)?valor:min;
            max = (max < valor)?valor:max;
            //System.out.println(next.getKey() + "\t" +value);
            
        }
        System.out.println("Máximo: "+max+" Mínimo: "+min);
    }