Mahato, S. B., Mandal, N. B., Pal, A. K., Maitra, S. K., Lehmann, C. W., & Luger, P. (1988).
A novel application of the Friedel-Crafts reaction to the synthesis of differently substituted polynuclear compounds. The Journal of Organic Chemistry, 53(23), 5554-5558. doi:10.1021/jo00258a034.