@article {136, title = {Variable penetration depth of interferometric synthetic aperture radar signals on Alaska glaciers: a cold surface layer hypothesis}, journal = {Annals of Glaciology}, volume = {54}, year = {2013}, pages = {218-223}, doi = {10.3189/2013AoG64A114}, author = {Alessio Gusmeroli and Anthony A. Arendt and D K Atwood and B. Kampes and M. Sanford and J. Young} }