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  2. Alexander Lubotzky and Igor Pak, The product replacement algorithm and Kazhdan's property (T), J. Amer. Math. Soc. 14 (2001), no. 2, 347–363 (electronic).[MR]
  3. Igor Pak, The product replacement algorithm is polynomial, 41st Annual Symposium on Foundations of Computer Science (Redondo Beach, CA, 2000), IEEE Comput. Soc. Press, Los Alamitos, CA, 2000, pp. 476–485.[MR]
  4. Igor Pak, What do we know about the product replacement algorithm?, Groups and Computation, III (Columbus, OH, 1999), Ohio State Univ. Math. Res. Inst. Publ., vol. 8, de Gruyter, Berlin, 2001, pp. 301–347.[MR]