@article {,
	title = {{The evolution of writhe in kink-unstable flux ropes and erupting filaments}},
	journal = {Plasma Physics and Controlled Fusion},
	volume = {56},
	year = {2014},
	pages = {064012},
	doi = {10.1088/0741-3335/56/6/064012},
	author = {T{\"o}r{\"o}k, T. and Kliem, B. and Berger, M.~A. and Linton, M.~G. and D{\'e}moulin, P. and van Driel-Gesztelyi, L.}
}
