1.- 3-ALKYL AND 3-CARBOXYALKYL STERANES IN MARINE EVAPORITIC OILS OF THE POTIGUAR BASIN, BRAZIL ELSEVIER; AMSTERDAM; NLD; NETHERLANDS, 1999 Ver registro 2.- Evidence for euphotic zone anoxia during the deposition of Aptian source rocks based on aryl isoprenoids in petroleum, Sergipe-Alagoas Basin, northeastern Brazil Elsevier;; III; International, 2013 Ver registro 3.- GEOSTERANES; IDENTIFICATION AND SYNTHESIS OF A NOVEL SERIES OF 3-SUBSTITUTED STERANES PERGAMON; OXFORD-NEW YORK; III; INTERNATIONAL, 1997 Ver registro 4.- Propyl ergostanoic acids; possible new indicator for oil biodegradation Elsevier;; III; International, 2010 Ver registro