Cite

    Ashima Thakur et al.. “Efficient synthesis of xanthenedione derivatives using cesium salt of phosphotungstic acid as a heterogeneous and reusable catalyst in water.” Synthetic communications, vol. 46, no. 21, 2016, pp. 1766–1771. http://access.bl.uk/ark:/81055/vdc_100038918407.0x000032