[1]Lawesson[ArkivfoerKemi,1957,vol.11,p.317,322]
[1]Lawesson[ArkivfoerKemi,1957,vol.11,p.317,322]
[1]ArkivfoerKemi,1957,vol.11,p.317,322
[1]ArkivfoerKemi,1957,vol.11,p.317,322
[1]Steinkopfetal.[JustusLiebigsAnnalenderChemie,1934,vol.512,p.136,156]