1. The use of hydroxynaphthol blue in the ultramicrodetermination of alkaline earth and lanthanide elements: an improved method;Brittain;Anal. Chim. Acta,1978
2. Spectrophotometric determination of lanthanides with calmagite;Brittain;Anal. Chim. Acta,1979
3. Photometric determination of molybdenum(V) with 8-hydroxyquinoline-5-sulphonic acid;Busev;Vestn. Univ., Ser. II, Khim,1961
4. Chlorophosphonazo-m-NO2. A new reagent for the spectrophotometric determination of cerium sub-group rare earth elements in the presence of yttrium sub-group elements;Chung-Gin;Anal. Chim. Acta,1981
5. Direct colorimetric method for the determination of trace amounts of rare earth elements in alloy steels by means of dicarboxyarsenazo III[3,3′-(1,8-dihydroxy-3,6-disulpho-2,7-naphthylene-bisazo)bis-(4-arsonobenzoic acid)];Guan;Huaxue Tongbao,1974