doi> Logullo, C.; VAZ JR, Itabajara ; SORGINE, Marcos ; SILVA, Gabriela Paiva ; FARIA, Flávio ; ZINGALE, R. ; LIMA, M. F. R. ; ABREU, Leonardo ; FIALHO, Eliane ; GONZALES, J. C. ; MASUDA, Hatisaburo ; MASUDA, Aoi ; OLIVEIRA, Pedro L de . Purification and characterization of an aspartic proteinase precursor from the egg of a hard tick Boophilus microplus.. Parasitology (London. Print), v. 116, p. 525-532, 1998.