[1]Mainagashev,I.Ya.;Lapachev,V.V.;Fedotov,M.A.;Mamaev,V.P.[ChemistryofHeterocyclicCompounds,1987,vol.23,#12,p.1339-1342][KhimiyaGeterotsiklicheskikhSoedinenii,1987,#12,p.1663-1667]
[1]Mainagashev,I.Ya.;Lapachev,V.V.;Fedotov,M.A.;Mamaev,V.P.[ChemistryofHeterocyclicCompounds,1987,vol.23,#12,p.1339-1342][KhimiyaGeterotsiklicheskikhSoedinenii,1987,#12,p.1663-1667]