Reference:
Ilkka Niemelä. Annual report for the year 1990. Helsinki University of Technology, Digital Systems Laboratory, Espoo, Finland, 1991.
Suggested BibTeX entry:
@misc{Niemela90:annual, author = {Ilkka Niemel{\"a}}, howpublished = {Helsinki University of Technology, Digital Systems Laboratory, Espoo, Finland}, title = {Annual Report for the Year 1990}, year = {1991}, }