[1]AnnalidiChimica(Rome,Italy),1955,vol.45,p.695,704
[1]JournalofHeterocyclicChemistry,2007,vol.44,#1,p.155-159
[1]JournaloftheChemicalSociety,1945,p.571,574
[1]ChemickeListy,1952,vol.46,p.637,639 Chem.Abstr.,1953,p.8070
[1]JournaloftheIndianChemicalSociety,1935,vol.12,p.465,469
[1]ChemickeListy,1952,vol.46,p.637,639 Chem.Abstr.,1953,p.8070
[1]ChemickeListy,1952,vol.46,p.637,639 Chem.Abstr.,1953,p.8070