1. The use of ionisation potentials, 1. Ionic radii of the elements;Ahrens;Geochim. Cosmochim. Acta,1952
2. Digital methods of photopeak integration in activation analysis;Baedecker;Anal. Chem.,1971
3. Note Illustrative della Carta Geologica d'Italia, Foglio 1: Passo del Brennero; Foglio 4a: Bressanone;Baggio,1969
4. Behaviour of the rare earths in fluorine-bearing media;Bandurkin;Geochemistry (U.S.S.R.), English Tranl.,1961
5. Zur Fraktionierung der Seltenen Erden in Fluoriten;Brätter;Erzmetall,1972