Mesquita, Isabel, 		Peña, José, 		Vilaça, Jaime, 		Davide, José, 		Daniel, Jorge, 		Graça, Luís, AND 		Teixeira, Manuel.
" Gangliocytic paraganglioma of ampulla of Vater: Clinical case" <em>Revista Portuguesa de Cirurgia</em> [Online],  Number 2 (29 September 2007)