array(3) {
  [0]=>
  int(3530)
  [1]=>
  string(244) "Delgado A., Marotta A., González L. Towards the construction of quality-aware Web Warehouses with BPMN 2.0 Business Processes // IEEE Eighth International Conference on Research Challenges in Information Science (RCIS’2014). 2014. pp. 1–6."
  [2]=>
  int(1)
}
<h1>DB Error 230: Duplicate entry '3530-1' for key 'citations.citations_submission_seq'</h1>