1. H. Bader R. Haefeli E. Bucher J. Neher O. Eckel Chr. Thams Snow and its metamorphism (Der Schnee und Seine Metamorphose, 1939) Transl. 14 313 1954
2. C. S. Benson Stratigraphic studies in the snow and firn of the Greenland ice sheet Rep. 70 93 1962
3. Antarctic Map Folio Series;Bentley,1964
4. V. N. Bogoslovski The temperature conditions (regime) and movement of the Antarctic glacial shield 47 287 305 Intern. Assoc. Sci. Hydrol. Gentbrugge 1958
5. The use of the rammsonde as an instrument for determining the density of firn;Bull;J. Glaciol,1956