[1]Steinkopfetal.[JustusLiebigsAnnalenderChemie,1934,vol.512,p.136,156]
[1]Lawesson[ArkivfoerKemi,1957,vol.11,p.317,322]
[1]Steinkopf;Hanske[JustusLiebigsAnnalenderChemie,1937,vol.532,p.236,248]
[1]Wang,Jizhou;Seefeld,MarkA.;Luengo,Juan[TetrahedronLetters,2011,vol.52,#48,p.6346-6348]
[2]Lawesson[ArkivfoerKemi,1957,vol.11,p.317,322]
[1]Steinkopf;Koehler[JustusLiebigsAnnalenderChemie,1936,vol.522,p.17,26]