1. Aspects of the geochemistry of the rare earths. Progress in Chemistry and Technology of the Bare Earths;Ahrens,1962
2. The K/Cs ratio in some basic rocks;Ahrens;Geochim. et Cosmochim. Acta,1961
3. Association of rubidium and potassium in common igneous rocks and meteorites;Ahrens;Geochim. et Cosmochim. Acta,1952
4. Abundance of Chemical Elements;Cherdyntsev,1961
5. On the zirconium/hafnium ratio in rocks of the Lovosero massif;Gerasimovsky;Geokhimya,1958