@book{157960,
	author = {Zorbalas, Konstantino and Wintershall Ag and INGEPET '99, International Seminar (3° : 1999 Oct. 26-29 : Lima, Perú) and Wintershall Ag},
	title = {Comparing investment efficiencies for oil and gas prospects in South America},
	url = {https://biblioteca.iapg.org.ar/ArchivosAdjuntos/Ingepet/EXPR-5-KZ-02.PDF}
}