AKERMAN, H. J. Periglacial forms of Svalbard. Periglacial Processes and landforms in Britain and Ireland. 1987, 9-25
ALDRICH, H. P. Frost penetration below high way and airfield pavement. Highway Research, Board. 1956, 135, 124-149
BAKKEHOI, S. Meteorological condition's influence on the permafrost ground in Sreagrura, Spitsbergen. Proceedings, Fifth Intern. Conf. on Permafrost 1. Tpir Publishers, Trondheim. 1988, 39-43
BLACK, R. F. Climatically significant fossil periglacial phenomena in north central United States. Biul. Peryglac. 1969, 20, 225-238
BROWN, R. J. E. Permafrost in the Canadian Arctic Archipelago. Zeitschrift fur Geomorphologie. 1972, Suppl. Bd. 13, 102-130