Kokkirala, S., Sabbavarapu, N. M., & Yadavalli, V. D. N. (2011). β-Cyclodextrin mediated synthesis of 1,8-dioxooctahydroxanthenes in water. European Journal of Chemistry, 2(2), 272–275. https://doi.org/10.5155/eurjchem.2.2.272-275.359