[1]Vernigor;Shalaev;Luk'yanets[ChemistryofHeterocyclicCompounds,1981,vol.17,#4,p.328-332]
[1]Vernigor;Shalaev;Luk'yanets[ChemistryofHeterocyclicCompounds,1981,vol.17,#4,p.328-332]
[1]Seha,Zdenek;Weis,ClausD[HelveticaChimicaActa,1980,vol.63,#2,p.413-419]
[1]Seha,Zdenek;Weis,ClausD[HelveticaChimicaActa,1980,vol.63,#2,p.413-419]