Trevisan Secretti, L.; Pereira, A.; Baggio Gnoatto, S. C.; Maronesi Bueno, L.; Lukasewics Ferreira, P.; Froehlich, P. E. Simple Method for Simultaneous Quantification of Two New Derivatives of Betulinic and Ursolic Acids With Antimalarial Activity by RP-HPLC-UV-CAD. Drug Anal. Res. 2020, 4, 31-39.