“CHEMICAL STUDY OF THE CONTRIBUTION PHTYRUSA Pyrifolia (H.B.K) EICHLER "welding With Welding»”. Revista Peruana De Química E Ingeniería Química, vol. 7, no. 1, Sept. 2004, pp. 3-6, https://revistasinvestigacion.unmsm.edu.pe/index.php/quim/article/view/4621.