code: def pingback_extensions_get_pingbacks(target):
      
      site = Site.objects.get_current()
  
      target_splitted = urlsplit(target)
      if target_splitted.netloc != site.domain:
          return TARGET_DOES_NOT_EXIST
  
      try:
          view, args, kwargs = resolve(target_splitted.path)
      except Resolver404:
          return TARGET_DOES_NOT_EXIST
  
      try:
          entry = Entry.published.get(
              slug=kwargs['slug'],
              publication_date__year=kwargs['year'],
              publication_date__month=kwargs['month'],
              publication_date__day=kwargs['day'])
      except (KeyError, Entry.DoesNotExist):
          return TARGET_IS_NOT_PINGABLE
  
      return [pingback.user_url for pingback in entry.pingbacks]
docs: pingback.extensions.getPingbacks(url) => '[url, url, ...]'
  
      Returns an array of URLs that link to the specified url.
  
      See: http://www.aquarionics.com/misc/archives/blogite/0198.html