[1]Gangopadhyay,A.K.;Mathur,K.B.[IndianJournalofChemistry-SectionBOrganicandMedicinalChemistry,1982,vol.21,#5,p.483-484]
[1]Waki;Kitajima;Izumiya[Synthesis,1981,vol.No.4,#4,p.266-268]
[1]JournaloftheAmericanChemicalSociety,2005,vol.127,p.6563-6572
[1]Singh,Yogendra;Stoermer,MartinJ.;Lucke,AndrewJ.;Guthrie,Tom;Fairlie,DavidP.[JournaloftheAmericanChemicalSociety,2005,vol.127,#18,p.6563-6572]