Should titles in the references be in title case? I wonder whether titles in the reference section be in title case, given that the publication venue's style files and publication instructions do not specify.

For example, which of the following should I use?


  [Collobert2011] Ronan Collobert. 2011. Deep learning for efficient discriminative parsing. In International Conference on Artificial Intelligence and Statistics, number EPFL-CONF-192374.


or


  [Collobert2011] Ronan Collobert. 2011. Deep Learning for Efficient Discriminative Parsing. In International Conference on Artificial Intelligence and Statistics, number EPFL-CONF-192374.
If the venue doesn't specify, then you should pick a style and stick with it. The venues I publish in tend to specify, so I just use the BiBTeX style associated with the venue (e.g., IEEE).