array(3) {
  [0]=>
  int(17421)
  [1]=>
  string(199) "Kumar A., Gorai A.K. Development of a deep convolutional neural network model for detection and delineation of coal mining regions // Earth Science Informatics. 2023. vol. 16. no. 2. pp. 1151–1171."
  [2]=>
  int(38)
}
<h1>DB Error 230: Duplicate entry '17421-38' for key 'citations.citations_submission_seq'</h1>