%0 Journal Article %A A. Siretskiy %A C. Elvingson %A P. N. Vorontsov-Velyaminov %T Stepwise conformation transitions for a semi-stiff ring polymer confined in a conical trap induced by the increasing external field or by cone's opening angle variation %J Nanosistemy: fizika, himiâ, matematika %D 2013 %P 225-235 %V 4 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2013_4_2_a8/ %G en %F NANO_2013_4_2_a8