array(3) {
  [0]=>
  int(16013)
  [1]=>
  string(237) "Zhaobo Chen, Gangzhu Qiao, Jianchao Zeng. Study on the Relationship between Worker States and Unsafe Behaviours in Coal Mine Accidents Based on a Bayesian Networks Model // Sustainability. 2019. Vol. 11. № 5021. DOI: 10.3390/su11185021"
  [2]=>
  int(1)
}
<h1>DB Error 230: Duplicate entry '16013-1' for key 'citations.citations_submission_seq'</h1>