@article{article349100b7,
title   = {Sesquiterpene lactones from glandular trichomes of Viguiera radula (Heliantheae; Asteraceae)},
author = {Spring, Otmar and Zipper, Reinhard and Conrad, Jurgen and Vogler, Bernhard and Klaiber, Iris and Da Costa, Fernando Batista},
year = {2003},
doi = {10.1016/s0031-9422(02)00747-1},
journal   = {Phytochemistry}
}