1. Diffusion of stable isotopes in polar firn and ice: the isotope effect in firn diffusion Johnsen, Sigfús J.; Clausen, Henrik B.; Cuffey, Kurt M.; Hoffmann, Georg; Creyts, Timothy T. 2000 Articles GeophysicsGeomorphology
2. Preliminary firn-densification model with 38-site dataset Spencer, M. K.; Alley, Richard B.; Creyts, Timothy T. 2001 Articles GeophysicsGeomorphology