array(3) {
  [0]=>
  int(13184)
  [1]=>
  string(112) "Agricola G. About mining and metallurgy in twelve books. Moscow: Akademiya nauk SSSR, 1962, p. 599 (in Russian)."
  [2]=>
  int(1)
}
<h1>DB Error 230: Duplicate entry '13184-1' for key 'citations.citations_submission_seq'</h1>