@article{8896,
  author = {Hai-Shou Yang and Q. Hong and Y. Ding},
  title = {A constant-alpha force-free-field analysis of the active region AR 4711 of February, 1986},
  year = {1988},
  journal = {Solar Physics},
  volume = {117},
  pages = {57-67},
  month = {Jan-01-1988},
  issn = {0038-0938},
  url = {http://link.springer.com/10.1007/BF00148572},
  doi = {10.1007/BF00148572},
}