Pulmonary sequestration: 2 cases (intralobar and extralobar) in surgically treated adults [in Spanish] - Arrabal Sánchez, R; Benítez Doménech, A; Pagés Navarrete, C; Fernández de Rota Avecilla, A; Fernández Bermúdez, J L (Arch Bronconeumol, 1998)