array(3) {
  [0]=>
  int(4176)
  [1]=>
  string(131) "Balonin N. A., Seberry Jennifer. Two-level Cretan Matrices Constructed Using SBIBD // Special Matrices. 2015. Vol. 3.1. P. 186-192."
  [2]=>
  int(21)
}
<h1>DB Error 230: Duplicate entry '4176-21' for key 'citations.citations_submission_seq'</h1>