@InProceedings{eisner:2002:ACL02-ETMTNLP,
  author    = {Jason Eisner},
  title     = {An Interactive Spreadsheet for Teaching the Forward-Backward Algorithm},
  booktitle = {Proceedings of the ACL-02 Workshop on Effective Tools and Methodologies for Teaching Natural Language Processing and Computational Linguistics},
  month     = {July},
  year      = {2002},
  address   = {Philadelphia, Pennsylvania, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {10--18},
  url       = {http://www.aclweb.org/anthology/W02-1002},
  doi       = {10.3115/1118108.1118110}
}
An interactive spreadsheet for teaching the forward-backward algorithm