S. Hajra, B. Maji and S. Bar. Samarium Triflate-Catalyzed Halogen-Promoted Friedel–Crafts Alkylation with Alkenes. Org. Lett. 2007, 9 (15): 2783–2786. doi:10.1021/ol070813t.
R. C. Fuson, H. H. Weinstock and G. E. Ullyot. A New Synthesis of Benzoins. 2′,4′,6′-Trimethylbenzoin. J. Am. Chem. Soc. 1935, 57 (10): 1803–1804. doi:10.1021/ja01313a015.
Robert Downs Haworth. Syntheses of alkylphenanthrenes. Part I. 1-, 2-, 3-, and 4-Methylphenanthrenes. J. Chem. Soc. 1932: 1125. doi:10.1039/JR9320001125.