Lavayen Sejas, Armando2026-03-232026-03-232009http://www.scielo.org.bo/scielo.php?script=sci_arttext&pid=S1817-74332009000100017&tlng=eshttps://andeanlibrary.org/handle/123456789/89147Vol. 12, No. 1esEL DON DE INVESTIGARArtÃculo CientÃfico Publicado