 Stella won a bronze medal in the 4×10 km relay at the 1966 FIS Nordic World Ski Championships in Oslo.Stella also won the 1971 Trofeo Mezzalama ski mountaineering event together with his brothers Aldo and Roberto as well as in the 1973 edition together with Aldo and Palmiro Serafini, and finished second in the military team category together with Aldo and Leo Vidi in the 1975 edition of the same competition, which was carried out as the first World Championship of Skimountaineering.Further notable results