Perez-Padilla R, de la Rosa-Zamboni D, Ponce de Leon S, Hernandez M, Quiñones-Falconi F, Bautista E, et al. (August 2009). "Pneumonia and respiratory failure from swine-origin influenza A (H1N1) in Mexico". The New England Journal of Medicine. 361 (7): 680–89. doi:10.1056/NEJMoa0904252. PMID19564631.
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ncbi.nlm.nih.gov
Perez-Padilla R, de la Rosa-Zamboni D, Ponce de Leon S, Hernandez M, Quiñones-Falconi F, Bautista E, et al. (August 2009). "Pneumonia and respiratory failure from swine-origin influenza A (H1N1) in Mexico". The New England Journal of Medicine. 361 (7): 680–89. doi:10.1056/NEJMoa0904252. PMID19564631.