For this period, the total number of identified published research papers was 72. Topics relating to ice wedges, thermokarst, palsas and patterned ground were characterised by high publication activity. Current trends suggest 3 main research thrusts
Bibliography ; Europe ; Ice wedge ; Inherited features ; Micromorphology ; Palaeo-environment ; Periglacial features ; Permafrost ; Pleistocene ; Quaternary ; Stratigraphy ; Thermokarst ; United States of America