code: def get_corresponding_author_info(self):
          
          resp = requests.get(self.scopus_url)
          from lxml import html
  
          parsed_doc = html.fromstring(resp.content)
          for div in parsed_doc.body.xpath('.//div'):
              for a in div.xpath('a'):
                  if '/cdn-cgi/l/email-protection' not in a.get('href', ''):
                      continue
                  encoded_text = a.attrib['href'].replace('/cdn-cgi/l/email-protection#', '')
                  key = int(encoded_text[0:2], 16)
                  email = ''.join([chr(int('0x{}'.format(x), 16) ^ key)
                                   for x in
                                   map(''.join, zip(*[iter(encoded_text[2:])]*2))])
                  for aa in div.xpath('a'):
                      if 'http://www.scopus.com/authid/detail.url' in aa.get('href', ''):
                          scopus_url = aa.attrib['href']
                          name = aa.text
                      else:
                          scopus_url, name = None, None
  
          return (scopus_url, name, email)
docs: Try to get corresponding author information.
  
          Returns (scopus-id, name, email).