S. K. Bandaru and M. C. Risi, “Zn(OAc)2.2H2O-Catalyzed C3-alkylation and O-alkylation of 4-Hydroxycoumarin derivatives: 10.55434/CBI.2022.20102”, Carib. J. Sci. Tech., vol. 10, no. 2, pp. 10–16, Sep. 2022.