cacm-15-859''" is the (unique) key of your BibTeX record. Depending on the style you've selected for your ... familiar with BibTeX or carefully looking at the record will notice that the journal is provided here as ... .
==== References ====
Adding a reference to a record in the text by using the (unique) key defined in ... cacm-15-859''" is the (unique) key of your BibTeX record. Depending on the style you've selected for your