1. An outbreak of influenza aboard a commercial airliner;Moser;Am J Epidemiol,1979
2. Pigs might fly;Woodhead;Eur Respir J,2009
3. Swine influenza: how much a global threat? [editorial]. Lancet. 2009;373:1495.
4. Nemery B, Piette D, Decramer M. Influenza A (H1N1) and holding an international respiratory congress. Lancet [publicación electrónica], 2009, mayo 12. Disponible en: http://download.thelancet.com/flatcontentassets/H1N1-flu/epidemiology/epidemiology-53.pdf.