Erik H. Hagen

Extraterrestrial spherules in glacial sediment from the Transantarctic Mountains, Antarctica - Structure, mineralogy, and chemical composition

Christian Koeberl, C. Koeberl, Erik H. Hagen, 1989 .

Extraterrestrial Spherules in Glacial Sediment, Beardmore Glacier Area, Transantarctic Mountains

G. Faure, C. Koeberl, Erik H. Hagen, 2013 .