Helix-coil transition in terms of Potts-like spins Artem Badasyan, Achille Giacometti, Rudolf Podgornik, Yevgeni Mamasakhlisov and Vladimir Morozov Eur. Phys. J. E, 36 5 (2013) 46 Published online: 14 May 2013 DOI: 10.1140/epje/i2013-13046-7