Determination of the origin of unusual glass with metallic spherule inclusions found in the area between Inzingkofen and Sigmaringen (Bavaria, Germany), south-west of the Steinheim-Ries craters
M. Ardit et al., Determination of the origin of unusual glass with metallic spherule inclusions found in the area between Inzingkofen and Sigmaringen (Bavaria, Germany), south-west of the Steinheim-Ries craters, Periodico di mineralogia (Testo stampato) , 75(2-3), 2006, pp. 11-24