APA

Perez A., Zelaya E., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B. & Zelaya E.Optimization of the operating conditions of a refinery using high percentages of heavy crude oil. : .

Chicago

Perez A, Zelaya E, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil) and Zelaya E.Optimization of the operating conditions of a refinery using high percentages of heavy crude oil. : .

Harvard

Perez A., Zelaya E., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B. and Zelaya E.Optimization of the operating conditions of a refinery using high percentages of heavy crude oil. : .

MLA

Perez A, Zelaya E, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil) and Zelaya E.: . .