N. T. Tra, T. B. Ngan, V. V. Nam, D. T. Thao, M. Litaudon, D. T. Mai Huong, N. V. Hung, C. V. Minh and P. V. Cuong, Terpenoids from leaves of Viburnum sambucinum Reinw. ex. Blume (Caprifoliaceae), VJChem 53 (2015). DOI: https://doi.org/10.15625/6891.