[1]GazzettaChimicaItaliana,1938,vol.68,p.625,635
[1]TetrahedronLetters,1993,vol.34,p.7509-7512
[1]Pei;Wickhan[TetrahedronLetters,1993,vol.34,#47,p.7509-7512]
[1]Pei;Wickhan[TetrahedronLetters,1993,vol.34,#47,p.7509-7512]
[1]GazzettaChimicaItaliana,1938,vol.68,p.625,635