Ngo, le-van; Thi, Van Cuong Pham (1981). "An unusual m-hydroxyacetophenone and three new chromanone derivatives from Chrysothamnus viscidiflorus". Phytochemistry. 20 (3): 485. Bibcode:1981PChem..20..485N. doi:10.1016/S0031-9422(00)84171-0.
Ngo, le-van; Thi, Van Cuong Pham (1981). "An unusual m-hydroxyacetophenone and three new chromanone derivatives from Chrysothamnus viscidiflorus". Phytochemistry. 20 (3): 485. Bibcode:1981PChem..20..485N. doi:10.1016/S0031-9422(00)84171-0.