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Trakal E, Ortiz A, Butti AL, Villafañe HA, Carena EA.Trakal E, et al. Among authors: butti al.Rev Esp Enferm Apar Dig. 1973 May 1;39(3):279-90.Rev Esp Enferm Apar Dig. 1973.PMID: 4711997Spanish.No abstract available.
Trakal E, Ortíz GA, Butti AL.Trakal E, et al. Among authors: butti al.Rev Esp Enferm Apar Dig. 1978 Feb 15;52(4):477-84.Rev Esp Enferm Apar Dig. 1978.PMID: 653079Spanish.No abstract available.
Trakal E, Ortiz GA, Butti AL.Trakal E, et al. Among authors: butti al.Rev Esp Enferm Apar Dig. 1972 Oct 1;38(3):313-20.Rev Esp Enferm Apar Dig. 1972.PMID: 5079221Spanish.No abstract available.
Trakál E, Ortiz GA, Butti AL.Trakál E, et al. Among authors: butti al.Acta Gastroenterol Latinoam. 1982;12(2):149-53.Acta Gastroenterol Latinoam. 1982.PMID: 7158243