Cristina Mayumi Sasaki, Beatriz Cristina Konopatzki Hirota, Cristina Peitz de Lima, Maria Christina dos Santos Verdam, Cristiane da Silva Paula, Suelen Cristina Chaves, Patrícia Maria Nunes Pavan, Marilis Dallarmi Miguel, and Obdulio Gomes Miguel. 2013. “Coumarin Isolation and Comparative Study of Biological Activities of Pterocaulon Alopecuroides DC and Pterocaulon Lorentzii Malme”. International Journal of Phytomedicine 5 (3):298-301. https://ijp.arjournals.org/index.php/ijp/article/view/264.