@article{6595, author = {G. Valori and B. Kliem and R. Keppens}, title = {Extrapolation of a nonlinear force-free field containing a highly twisted magnetic loop}, year = {2005}, journal = {Astronomy & Astrophysics}, volume = {433}, number = {1}, pages = {335-347}, month = {Apr}, isbn = {0004-6361}, url = {://000227665300033}, language = {eng}, }