@book{157747,
	author = {Cunha, J.C. and Petrobras and INGEPET '99, International Seminar (3° : 1999 Oct. 26-29 : Lima, Perú) and Rosa, Fábio S.N. and Petrobras},
	title = {Underbalanced drilling in Brazil},
	url = {https://biblioteca.iapg.org.ar/ArchivosAdjuntos/Ingepet/EXPL-4-JC-03.PDF}
}