code: def linked_parameters(self):
          
  
          # Refresh the list
  
          self._update_parameters()
  
          # Filter selecting only free parameters
  
          linked_parameter_dictionary = collections.OrderedDict()
  
          for parameter_name, parameter in self._parameters.iteritems():
  
              if parameter.has_auxiliary_variable():
  
                  linked_parameter_dictionary[parameter_name] = parameter
  
          return linked_parameter_dictionary
docs: Get a dictionary with all parameters in this model in a linked status. A parameter is in a linked status
          if it is linked to another parameter (i.e. it is forced to have the same value of the other parameter), or
          if it is linked with another parameter or an independent variable through a law.
  
          :return: dictionary of linked parameters