[1]Kierzek,Ryszard;Rozek,Marek;Markiewicz,WojciechT.[BulletinofthePolishAcademyofSciences:Chemistry,1987,vol.35,#11-12,p.507-516]
[1]Metelev,ValeriiG.;Krynetskaya,NatalyaF.;Purmal,AndreiA.;Shabarova,ZoyaA.;Tocik,Zdenek;etal.[CollectionofCzechoslovakChemicalCommunications,1990,vol.55,#11,p.2781-2786]
[1]Gladkaya,V.A.;Levitskaya,Z.V.;Shalamai,A.S.;Usenko,L.S.;Dashevskaya,T.A.[ChemistryofNaturalCompounds,1989,vol.25,#4,p.488-492]
[2]Metelev,ValeriiG.;Krynetskaya,NatalyaF.;Purmal,AndreiA.;Shabarova,ZoyaA.;Tocik,Zdenek;etal.[CollectionofCzechoslovakChemicalCommunications,1990,vol.55,#11,p.2781-2786]
[1]Hodge,RichardP.[TetrahedronLetters,1995,vol.36,#17,p.2933-2936]
[2]Hodge,RichardP.[TetrahedronLetters,1995,vol.36,#17,p.2933-2936]
[1]Sergeeva;Lokhov;Ven'yaminova[RussianJournalofBioorganicChemistry,1996,vol.22,#12,p.800-806]