Elements of finite order in the fundamental group of a branched cyclic covering. Antonio F. Costa (1985) Collectanea Mathematica
Embeddings and imnmersions of branched covering spaces. Daniel O'Donnell (1983) Collectanea Mathematica
Estudio intrínseco de piezas Navier-hiperelásticas (Elastostática de piezas longitudinales conservativas). E. Garbayo, M.A. Puigví (1985) Collectanea Mathematica