array(3) {
  [0]=>
  int(4187)
  [1]=>
  string(151) "Seberry J., and Balonin N. A. Two Infinite Families of Symmetric Hadamard Matrices. Australasian Journal of Combinatorics, 2017, no. 69(3), pp. 349357."
  [2]=>
  int(1)
}
<h1>DB Error 230: Duplicate entry '4187-1' for key 'citations.citations_submission_seq'</h1>