[1]Perez-Medinaetal.[JournaloftheAmericanChemicalSociety,1947,vol.69,p.2574,2577]
[1]Shramm,N.I.;Konshin,M.E.[ChemistryofHeterocyclicCompounds,1984,vol.20,#3,p.301-304][KhimiyaGeterotsiklicheskikhSoedinenii,1984,vol.20,#3,p.372-375]
[1]Shvekhgeimer,M.-G.A.;Kobrakov,K.I.;Pavlov,A.G.;Sychev,S.S.;Popandopulo,N.G.[DokladyChemistry,1989,vol.308,#1-3,p.265-268][DokladyAkademiiNaukSSSR,1989,vol.308,#2,p.389-393]
[2]Shvekhgeimer;Kobrakov;Gafarov[DokladyChemistry,2001,vol.377,#1-3,p.78-79]
[1]Shramm,N.I.;Konshin,M.E.[ChemistryofHeterocyclicCompounds,1984,vol.20,#3,p.301-304][KhimiyaGeterotsiklicheskikhSoedinenii,1984,vol.20,#3,p.372-375]
[1]Perez-Medinaetal.[JournaloftheAmericanChemicalSociety,1947,vol.69,p.2574,2577]