Narayana, V. R. and Varala, R. (2020) “Studies on SO4?2/SnO2 (STO)-Catalyzed C3- and O-Alkylation of 4-Hydroxycoumarin”, Current Research and Development in Chemistry Vol. 2, pp. 56-76. Available at: https://stm1.bookpi.org/index.php/crdc-v2/article/view/1352 (Accessed: 18June2026).