1. Alon N, Galil Z, Margalit O (1991) On the exponent of the all pairs shortest path problem. In: Proceedings of the 32th IEEE FOCS, San Juan, pp 569–575. Also JCSS 54 (1997), pp 255–262
2. Alon N, Galil Z, Margalit O, Naor M (1992) Witnesses for Boolean matrix multiplication and for shortest paths. In: Proceedings of the 33th IEEE FOCS, Pittsburgh, pp 417–426
3. Coppersmith D (1997) Rectangular matrix multiplication revisited. J Complex 13:42–49
4. Coppersmith D, Winograd S (1990) Matrix multiplication via arithmetic progressions. J Symb Comput 9:251–280
5. Huang X, Pan VY (1998) Fast rectangular matrix multiplications and applications. J Complex 14:257–299