Free energy of formation of small ice nuclei near the Widom line in simulations of supercooled water Connor R. C. Buhariwalla, Richard K. Bowles, Ivan Saika-Voivod, Francesco Sciortino and Peter H. Poole Eur. Phys. J. E, 38 5 (2015) 39 Published online: 21 May 2015 DOI: 10.1140/epje/i2015-15039-x