Nikolova, R. P., Shivachev, B., Mikhova, B., Stamboliyska, B., Mladenovska, K., Panovska, A. P., & Popovski, E. (2012). Synthesis and structure of (<i>R,S</i>)-2-methyl-4-(4-nitrophenyl)-pyrano[3,2-c]chromen-5(4<i>H</i>)-one. Macedonian Journal of Chemistry and Chemical Engineering, 32(2), 239–250. https://doi.org/10.20450/mjcce.2013.445