title: How do I sort my references in LaTeX by order of appearance, whilst still showing URLs?
body: <p>I want to sort my references by order of appearance rather than alphabetically, and I'm led to believe that I need to use the 'unsrt' style to do that. However, the 'unsrt' style doesn't support displaying URLs in the Bibliography (at least, not as far as I can see anyway).</p>
  
  <p>How can I display URLs in my bibliography, whilst still sorting it by order of appearance?</p>
  
  <p>I'm using BibDesk to create the .bib file, and a typical entry that I need to display with a URL looks like:</p>
  
  <pre><code>@webpage{iasi,
  Author = {ESA},
  Date-Added = {2011-04-11 09:12:00 +0100},
  Date-Modified = {2011-04-11 10:09:33 +0100},
  Keywords = {iasi, so2, satellite},
  Lastchecked = {11th April 2011},
  Title = {{M}et{O}p - {IASI}},
  Url = {http://www.esa.int/esaME/iasi.html},
  Bdsk-Url-1 = {http://www.esa.int/esaME/iasi.html}}
  </code></pre>