Reference:
Ilkka Niemelä. Annual report for the year 1991. Helsinki University of Technology, Digital Systems Laboratory, Espoo, Finland, 1992.
Suggested BibTeX entry:
@misc{Niemela91:annual, author = {Ilkka Niemel{\"a}}, howpublished = {Helsinki University of Technology, Digital Systems Laboratory, Espoo, Finland}, title = {Annual Report for the Year 1991}, year = {1992}, }