Will the UK’s general election lead to an in-out referendum?

A piece for E!Sharp on the seven scenarios through which the forthcoming UK general election could lead to an in-out referendum on UK membership of the EU:

http://esharp.eu/essay/37-will-the-uk-s-general-election-lead-to-an-in-out-referendum/ 

Britain's European Question Will Not Be Answered by an In-Out Vote

Another piece, this one for the Huffington Post, on the limits of a British referendum on EU membership.

http://www.huffingtonpost.co.uk/tim-oliver/eu-referendum_b_6895716.html