The influence of Lifshitz forces and gas on premelting of ice within porous materials M. Boström, O. I. Malyi, P. Thiyam, K. Berland, I. Brevik, C. Persson and D. F. Parsons EPL, 115 1 (2016) 13001 Published online: 10 August 2016 DOI: 10.1209/0295-5075/115/13001