Nguyen, T., Tran, P., & Nguyen, C. (2016). Layered double hydroxides Cu-Al: Synthetic and catalytic applications in the alkylation reaction of indole with benzaldehydes. VNUHCM Journal of Science and Technology Development, 19(4), 95-102. https://doi.org/https://doi.org/10.32508/stdj.v19i4.687