@inproceedings{1973-hopcroft-duality-draft ,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1973/\allowbreak hopcroft-duality-draft}. Note: see also newer version $0} ,author={John E. Hopcroft and J. Musinski} ,crossref={1973-aho-stoc5} ,MR={56:17201} ,pages={73--87} ,title={{Duality applied to the complexity of matrix multiplications and other bilinear forms}} ,year={1973} }