Looks nice, but it doesn't retrieve results for many of the DOIs I tried, e.g. 10.1155/2014/863625 and 10.4103/0970-2113.129901, and gave an incorrect result for this one: 10.1073/pnas.1324197111<p>Feature suggestions: would be nice if it accepted PubMed ids, and supported other popular citation styles like Hardvard and Vancouver (or alternatively, permitted some customisation of the citation format).