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KT (K-theory)
Panin, I. A. Comparison of Quillen’s and Volodin’s -theories. (Russian) Zap. Nauchn. Sem. Leningrad. Otdel. Mat. Inst. Steklov. (LOMI) 175 (1989), Koltsa i Moduli. 3, 93–105, translation in J. Soviet Math. 57 (1991), no. 6, 3500–3507.
Mentioned in the review of: MR1945530 (2004f:19003) Igusa, Kiyoshi Higher Franz-Reidemeister torsion.
Matthias Wendt should be an expert on this.
nLab page on Volodin K-theory