array(3) {
  [0]=>
  int(3220)
  [1]=>
  string(125) "Wigley T.M. A combined mitigation/geoengineering approach to climate stabilization // Science. 2006. vol. 314. pp. 452–454."
  [2]=>
  int(5)
}
<h1>DB Error 230: Duplicate entry '3220-5' for key 'citations.citations_submission_seq'</h1>