Reference

Marta Vila Taboada, Daniel Fernandez Mosquera, Fernando Lopez Gonzales, Aurora Grandal di Anglade, Juan Ramon Vidal Romani (2000): Applications of stable isotopic signals (513C, 815N) as palaeoenvironmental indicators. The case of Ursus spelaeus Ros.-Hein. – Beiträge zur Paläontologie – 25: 183 - 185.