" Method for chemical analysis of yttrium and yttrium oxide--Determination of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide,erbium oxide
" Gadolinium oxide-Determination of samarium oxide, europium oxide, terbium oxide, dysprosium oxide and yttrium oxide contents-Emission spectrographic method"
" Europium oxide of phosphor grade--Determination of cerium oxide, praseodymium oxide, samarium oxide, gadolinium oxide and dysprosium oxide contents--Spectrochemical method and direct spectrographic method"