[1]Wood;Bergstrom[JournaloftheAmericanChemicalSociety,1933,vol.55,p.3648,3650]
[1]Neugebauer,FranzAlfred;Siegel,Rolf[ChemischeBerichte,1985,vol.118,#6,p.2157-2163]
[1]Marcelis,AntoniusT.M.;Plas,HenkC.vander[JournalofHeterocyclicChemistry,1987,vol.24,p.545-548]
[1]Meijere,A.de;Erden,Ihsan;Weber,Walter;Kaufmann,Dieter[JournalofOrganicChemistry,1988,vol.53,#1,p.152-161]
[1]Marcelis,AntoniusT.M.;Tondijs,Hanna;Plas,HenkC.vander[JournalofHeterocyclicChemistry,1988,vol.25,p.831-833]