Quantitative variations of phenolic compounds related to thallus age in Umbilicaria antarctica Autor: Quilhot, Wanda; Sagredo, María Gloria; Campalans, Eliette; Hidalgo, María Eliana; Peña, Wenceslao; Fernández, Ernesto; Piovano, Marisa Fecha:1991
Temporal variation in usnic acid concentration in Usnea aurantiaco-atra (Jaq.) Bory Autor: Quilhot, Wanda; Peña, Wenceslao; Flores, Eva; Hidalgo, María Eliana; Fernández, Ernesto; Leighton, Gerardo Fecha:1991