array(3) {
  [0]=>
  int(1709)
  [1]=>
  string(137) "<em>Anureev I.S.</em> Program specific transition systems//Joint NCC & IIS Bulletin. Series Computer Science. 2012. 32. 21 p. (to appear)"
  [2]=>
  int(28)
}
<h1>DB Error 230: Duplicate entry '1709-28' for key 'citations.citations_submission_seq'</h1>