array(3) {
  [0]=>
  int(4360)
  [1]=>
  string(106) "Sklar Bernard. Digital Communications: Fundamentals and Applications. - Prentice-Hall PTR, 2001. - 1079 p."
  [2]=>
  int(7)
}
<h1>DB Error 230: Duplicate entry '4360-7' for key 'citations.citations_submission_seq'</h1>